Hasil untuk "General. Including nature conservation, geographical distribution"

Abhirup Saha, Ratnadeep Sarkar, Rujas Yonle et al.

A year-long light-trap study recorded the moth faunal diversity from the University of North Bengal campus, which is situated in the Himalayan foothills or Terai region of West Bengal, from September 2023 to August 2024. A total of 125 species of moths representing 104 genera belonging to 14 families were recorded during this study. Among them, the families Erebidae (36 spp.), Crambidae (32 spp.), and Geometridae (28 spp.) contributed the maximum species records. Their presence in this area highlights the need for regular monitoring throughout the district.

Juan José Guadalupe, Juan José Guadalupe, Gabriela Pozo et al.

Zhang Hui, Aftab Haider, Asif Khan

Plastic waste pollution in oceans has emerged as a severe global crisis, exacerbated by international trade. The increased movement of goods, particularly plastic-based products, contributes significantly to marine plastic pollution. This study explores the intersection of international trade and plastic waste, focusing on legal and policy challenges. Using a qualitative research design, this paper reviews international legal frameworks such as the Basel Convention, the United Nations Convention on the Law of the Sea (UNCLOS), and regional trade agreements to assess their effectiveness in addressing plastic waste issues. The research highlights critical enforcement gaps, lack of standardized regulations, and insufficient international cooperation as major obstacles to effective plastic waste management. Key findings suggest strengthening international legal frameworks, enhancing monitoring and compliance mechanisms, and promoting sustainable trade practices are crucial for mitigating plastic pollution in oceans. The study underscores the necessity for binding agreements within trade policies to ensure a sustainable balance between economic growth and marine ecosystem preservation.

Mina Tarakemeh, Shenglong Xu

We show that operator dynamics in U(1) symmetric systems are constrained by two independent conserved charges and construct a non-Abelian operator size basis that respects both, enabling a symmetry-resolved characterization of operator growth. The non-Abelian operator size depends on the operator's nonlocal structure and is organized by an SU(2) algebra. Operators associated with large total angular momentum are relatively simple, while those with small angular momentum are more complex. Operator growth is thus characterized by a reduction in angular momentum and can be probed using out-of-time-ordered correlators. Using the charge-conserving Brownian Sachdev-Ye-Kitaev model, we derive an exact classical master equation that governs the size distribution, the distribution of an operator expanded in this basis, for arbitrary system sizes. The resulting dynamics reveal that the size distribution follows a chi-squared form, with the two conserved charges jointly determining the overall time scale and the shape of the distribution. In particular, single-particle operators retain a divergent peak at large angular momentum throughout the time evolution.

Yuling Yang, Yuling Yang, Yuling Yang et al.

To investigate the effects of ocean acidification (OA) and nitrogen limitation on macroalgae growth and photophysiological responses, Gracilariopsis lemaneiformis was cultured under two main conditions: ambient (Low CO2, LC, 390 μatm) and CO2 enriched (High CO2, HC, 1000 μatm), with low (LN, 7 μmol L-1) and high (HN, 56 μmol L-1) nitrate. High CO2 levels decreased growth under both LN and HN treatments. HC reduced Chl a, carotenoids, phycoerythrin (PE), and phycocyanin (PC) under HN conditions, while only Chl a decreased under LN conditions. NO3- uptake rate was restricted under LN compared to HN, while HC enhanced it under HN. Net photosynthetic O2 evolution rates did not differ between CO2 and nitrate treatments. Dark respiration rates were higher under HN, further boosted by HC. The stimulated effective quantum yield (Y(II)) corresponded to decreased non-photochemical quenching (NPQ) under HN conditions. Nitrate, not CO2, showed significant effects on the relative electron transport rate (rETRmax), light use efficiency (α) and saturation light intensity (Ik) that with lowered rETRmax and α under LN culture. Our results indicate that OA may negatively affect Gracilariopsis lemaneiformis growth and alter its photophysiological performance under different nutrient conditions.

Shouyi Qiao, Wei Yin, Yuhao Liu et al.

This study examines the shift in China’s seafood production, revealing that mariculture has surpassed marine capture as the primary source of marine food. The research aims to assess the roles of marine capture and mariculture in meeting rising food demand and ensuring nutrition security, given the limitations of land-based food production. Using data from 2003 to 2021, the study highlights several key trends: mariculture, focused on shellfish and algae, now outpaces marine capture, which remains centered on fish and crustaceans. Significant regional disparities are observed, with mariculture expanding rapidly in several coastal provinces as marine capture declines. Nutrient supply from marine capture has followed a three-phase pattern of growth, stagnation, and decline, while mariculture’s nutrient output has steadily increased, particularly in protein. By 2019-2020, mariculture surpassed marine capture in energy and protein supply, though fat supply remains lower. Regional differences in nutrient supply show mariculture leading in multiple provinces. The study concludes by recommending strategies to promote sustainable, diverse, and environmentally friendly practices for China’s marine food systems.

Chenhui Liu, Chenhui Liu, Shao-Yong Jiang et al.

Two accretionary sediment sequences from Sites 1245 and 1252 recovered during Ocean Drilling Program (ODP) Leg 204 at southern Hydrate Ridge were investigated to explore the response of geochemical partitioning of iron and sulfur isotopic composition of authigenic pyrite to non-steady-state depositional and diagenetic scenarios. Five iron species were characterized by a modified sequential extraction procedure that covers almost all iron-bearing minerals in sediment cores, including: (1) iron-bearing carbonates, mainly siderite; (2) ferric (hydr)oxides, probably ferrihydrite and/or lepidocrocite; (3) magnetite; (4) iron-bearing silicates; and (5) pyrite. Highly reactive iron has been accumulated for a long-term steady-state history and its pyritization, to varying degrees, is limited by availability of dissolved sulfide. This causes pyrite and siderite occurred in the same sedimentary layer and shows an inverse relationship between their concentrations. From this, their proportions to highly reactive iron can be chosen for evaluating the degree of sulfidization. A significant change in sulfur isotopic composition of pyrite (-42.4 to +16.8‰ VCDT) indicates that the steady-state conditions are dramatically limited, where the δ34S values higher than -20‰ may result from an upward shift of SMT zone close to the seafloor or a sudden, massive depositional event. To explain the downcore sulfidization effects and pyrite δ34S values, we developed two categories of conceptual scenarios based on variations in sedimentation rate and methane flux. The geochemical features similar to those derived from each scenario were searched in the sediment columns and the non-steady-state events behind the scenarios were proved to be consistent with the real observations. Thus, iron species and pyrite δ34S values can be regarded as a proxy to differentiate different non-steady-state depositional and diagenetic controls on the sedimentary record.

Sergio González

Valerio Marsocci, Nicolas Gonthier, Anatol Garioud et al.

Land cover maps are a pivotal element in a wide range of Earth Observation (EO) applications. However, annotating large datasets to develop supervised systems for remote sensing (RS) semantic segmentation is costly and time-consuming. Unsupervised Domain Adaption (UDA) could tackle these issues by adapting a model trained on a source domain, where labels are available, to a target domain, without annotations. UDA, while gaining importance in computer vision, is still under-investigated in RS. Thus, we propose a new lightweight model, GeoMultiTaskNet, based on two contributions: a GeoMultiTask module (GeoMT), which utilizes geographical coordinates to align the source and target domains, and a Dynamic Class Sampling (DCS) strategy, to adapt the semantic segmentation loss to the frequency of classes. This approach is the first to use geographical metadata for UDA in semantic segmentation. It reaches state-of-the-art performances (47,22% mIoU), reducing at the same time the number of parameters (33M), on a subset of the FLAIR dataset, a recently proposed dataset properly shaped for RS UDA, used for the first time ever for research scopes here.

Eduardo Guendelman

Complexifying space time has many interesting applications, from the construction of higher dimensional unification, to provide a useful framework for quantum gravity and to better define some local symmetries that suffer singularities in real space time. In this context here spacetime is extended to complex spacetime and standard general coordinate invariance is also extended to complex holomorphic general coordinate transformations. This is possible by introducing a non Riemannian Measure of integration, which transforms avoiding non holomorphic behavior . Instead the measure transforms according to the inverse of the jacobian of the coordinate transformation and avoids the traditional square root of the determinant of the metric $\sqrt{-g}$. which is not globally holomorphic , or the determinant of the vierbein which is sensitive to the vierbein orientations and not invariant under local lorentz transformations with negative determinants. A contribution to the cosmological term appears as an integration constant in the equations of motion. A proposed action for Finsler geometry, which involves $-g$ rather than $\sqrt{-g}$ will also constitute an example of a Holomorphic General Coordinate Invariant Modified Measure Gravitational Theory.

Yilei Fu, Aifeng Li, Aifeng Li et al.

The neurotoxin β-N-methylamino-L-alanine (BMAA) produced by cyanobacteria and diatoms can accumulate in diverse aquatic organisms through the food web. In the present study, embryos of mussel Mytilus galloprovincialis (Lamarck, 1819), oyster Magallana gigas (Thunberg, 1793), and marine medaka Oryzias melastigma (McClelland, 1839) were exposed to BMAA dissolved in seawater and monitored for early developmental effects. Results demonstrated that the embryonic development of mussels and oysters were significantly inhibited when BMAA concentrations were above 100 μg BMAA·HCl/L (0.65 µM) and 800 μg BMAA·HCl/L (5.18 µM), respectively. The shell growth of mussel embryos was also markedly inhibited by BMAA ≥ 100 μg BMAA·HCl/L (0.65 µM). Based on the dose-response curves related to the modified malformation rate of embryos, the median effective concentration (EC50) values of mussel (48 h) and oyster (24 h) embryos were 196 μg BMAA·HCl/L (1.27 µM) and 1660 μg BMAA·HCl/L (10.7 μM), respectively. A sustained and dose-dependent decrease in heart rate was apparent in marine medaka embryos at 9-days post fertilization following BMAA exposure. However, no obvious effect on ATP concentration was noted in these marine medaka embryos. The current study contributes to our understanding of the sublethal effects of BMAA on the early embryonic development of marine bivalves and medaka. Further research examining the long-term effects of BMAA on the early development of marine organisms is necessary to determine seawater quality criteria for protection.

Wang Zhen, Wu Jinhua, Li Jiahui et al.

[Objective] The temporal and spatial changes of the cultivated land resource carrying capacity index of Shaanxi Province from 2010 to 2019 were analyzed, and the cultivated land resource carrying capacity index and human-grain relationship were predicted from 2020 to 2025, in order to provide theoretical reference for territorial spatial planning and cultivated land protection policy in Shaanxi Province. [Methods] Based on the panel data of the statistical yearbook, the research was carried out by using the center of gravity migration model, Geodetector and GM(1,1) model. [Results] ① From 2010 to 2019, the overall grain production, population, and cultivated land carrying capacity of Shaanxi Province increased, while the LCCI (land carrying capacity index) fluctuated slightly and decreased, and the human-grain relationship slightly eased. The LCCI of different administrative region fluctuated greatly, and the time periods of the drastic changes occurred from 2010 to 2011, 2014 to 2015, and 2017 to 2018. ② From 2010 to 2019, there were great regional differences in the LCCI in Shaanxi Province, showing a spatial pattern of high in the south and low in the north. Xi'an City and Yangling Agricultural Hi-tech Industries Demonstration Zone were high-value centers, while Yulin City was a low-value center. From the perspective of zoning, the order of the LCCI was Southern Shaanxi region> Guanzhong region> Northern Shaanxi region. The center of gravity of the LCCI of Shaanxi Province in the past 10 years was located in Xianyang City, and the overall migration direction was from northeast to southwest, pointing to Xi'an City and Yangling Agricultural Hi-tech Industries Demonstration Zone. There were obvious mutation in the path between 2013—2015 and 2017—2018, which was related to the fluctuation of the LCCI of different administrative regions. ③ The most important factor affecting the temporal and spatial changes of the LCCI in Shaanxi Province was the per capita cultivated land area, with an average explanatory rate of 69.21%. ④ It was predicted that the LCCI of Shaanxi Province would decline slightly from 2020 to 2025, and the spatial pattern would remain high in the south and low in the north. Except for the two low-value centers of Tongchuan City and Weinan City, Yulin City, the human-grain relationship in other administrative regions were more tense. [Conclusion] The human-grain relationship in Shaanxi Province is relatively tense, and the changes in the cultivated LCCI of various administrative regions show volatility and strong spatial heterogeneity. The cultivated LCCI in Shaanxi Province is mainly affected by the area of cultivated land per capita.

Dong-Xi Liu, Dong-Xi Liu, Dong-Xi Liu et al.

The importance of mangroves in blue carbon storage has been widely reported. However, the potential contribution of microbial extracellular polymeric substances (EPS) to the carbon pool is still poorly understood in mangrove ecosystems. Thus, a natural mangrove reserve located in Gaoqiao was chosen to investigate the linkage between microbial EPS and sediment organic carbon. Sequential resin extraction, Fourier transform infrared spectroscopy (FTIR), and 16S high-throughput sequencing were employed to determine the variations in EPS and bacterial taxa in different mangrove communities. Both EPS and EPS-C increased significantly with mangrove zonation from seaward to landward, irrespective of the EPS subfractions (colloidal and bound EPS) and components (extracellular protein and polysaccharide). Moreover, both EPS and EPS-C were found to be positively correlated with soil organic carbon. The present data further showed that EPS-C accounted for 1.84~10.69% of TOC in surface sediments. Multiple functional groups (e.g., O-H, N-H, and C=O), which may provide ligands for particle adsorption and complexation, were identified by FTIR. Consistent with the ascend of EPS with mangrove zonation from seaward to landward, the highest transmittance intensity for all functional groups was consistently exhibited in EPS isolated from landward Rhizophoraceae forest. In addition, the present data also indicated an interesting positive linkage between EPS and the abundance of some specific bacterial taxa, such as Rhizobiales, Corynebacteriales, and Gaiellales. In summary, this study claims the importance of EPS in the carbon pool in mangrove ecosystems. The present study may provide a better understanding of the functions of mangroves in carbon stocks.

Einar Ringø, Xuemei Li, Hien van Doan et al.

Growing demands stimulate the intensification of production and create the need for practices that are both economically viable and environmentally sustainable. As European Union banned the use of antibiotics in production in 2003, several alternative treatments have been suggested, including probiotics. The first probiotic study in aquaculture was published in 1986, and since then probiotics have been considered as a beneficial tool in this industry. Today current evidence suggests that administration of certain probiotic strains might be able to enhance growth rate, improve the welfare of different fish species by modulating gut microbiota, improve physiological functions, such as metabolism, digestion, immunity, stress tolerance, intestinal histology, and disease resistance. Even though lactic acid bacteria and Bacillus spp. are the most frequently used probiotics in aquaculture, numerous studies have been published on other interesting probiotics. Therefore, the purpose of this paper is to summarize, comment, and discuss the current knowledge related to the effects of Aeromonas, Aliivibrio, Alteromonas, Arthrobacter, Bifidobacterium, Brochothrix, Clostridium, Enterovibrio, Kocuria, Microbacterium, Micrococcus, Paenibacillus, Phaeobacter, Pseudoalteromonas, Pseudomonas, Rhodococcus, Rhodopseudomonas, Rhodosporidium, Roseobacter, Shewanella and Vibrio as probiotics in finfish aquaculture, and present general information on their presence in the gastrointestinal tract of finfish. Moreover, some considerations for future studies are also indicated.

Alexander Roth, Wolf-Peter Schill

To reduce greenhouse gas emissions, many countries plan to massively expand wind power and solar photovoltaic capacities. These variable renewable energy sources require additional flexibility in the power sector. Both geographical balancing enabled by interconnection and electricity storage can provide such flexibility. In a 100% renewable energy scenario of twelve central European countries, we investigate how geographical balancing between countries reduces the need for electricity storage. Our principal contribution is to separate and quantify the different factors at play. Applying a capacity expansion model and a factorization method, we disentangle the effect of interconnection on optimal storage capacities through distinct factors: differences in countries' solar PV and wind power availability patterns, load profiles, as well as hydropower and bioenergy capacity portfolios. Results show that interconnection reduces storage needs by around 30% in contrast to a scenario without interconnection. Differences in wind power profiles between countries explain around 80% of that effect.

Affendy Hassan, Parveena Balachandran, Khairiyyah R. Khamis

Macropropagation using cutting for larger multiplying seedlings is cheaper and efficient instead of clonal seeds for uniform plant material seedling production. However, information on root growth of Eucalyptus pellita at early development from seed and stem cutting of E. pellita seedlings is still lacking. With such information, it is useful for forest plantation company management in enhancing the understanding of strategies to optimize yield production with the appropriate agronomic or silvicultural approach in the field of planting. Therefore, the objectives of this study were to compare the root development of two different types of propagation seedlings of E. pellita and to study the effect of various nitrogen concentration levels on two different types of propagation of E. pellita seedlings. The study was conducted using E. pellita seedlings from two different types of propagation, namely, seed and stem cuttings, along with three different nitrogen concentrations (0, 50, and 200 kg N ha−1). Shoot biomass, root intensity (RI), total root intensity (TRI), root biomass, root length density (RLD), and specific root length (SRL) were recorded. Dried shoot biomass, RLD, and SRL of E. pellita seedlings using stem cutting were significantly higher (P<0.05) compared to seed, whereas there were no significant differences (P>0.05) for root biomass, TRI, and RI between the propagation types of E. pellita seedlings. In conclusion, E. pellita seedlings from stem cutting were greater in terms of root distribution compared to propagation by seeds at the nursery stage, and 50 kg N ha−1 was the optimal nitrogen concentration level from the considered levels to be applied to the E. pellita seedlings.

Kyle W. Fouke, Kyle W. Fouke, Jeffrey M. Trop et al.

Next-generation high resolution brightfield microscopy, x-radiography, and microcomputed tomography (microCT) analyses indicate that coral skeleton high density band (HDB) and low density band (LDB) stratigraphic sequences record dynamic changes in coral growth history. HDB-LDB sequences were studied within three small heads of Orbicella annularis, an ecological keystone species in the Caribbean Sea, collected from the leeward fringing reefs on Curaçao. Results indicate that HDB layers are formed by the thickening of exothecal and endothecal dissepiments, costae, and theca located at the margin and external to individual skeletal cups (corallites). Conversely, septa and columellas located inside individual corallites do not change in thickness. HDB-LDB stratigraphic sequences were laterally traced from the center to the margins of individual coral heads, demonstrating that shifts took place in the trajectory of coral skeleton growth. Normal HDB layers in the center of individual coral heads are formed at the same time (age-equivalent) as surfaces of erosion and no skeleton growth (hiatuses) on the margins of the heads. These hiatus surfaces within HDB-LDB stratal geometries indicate that multiple marine ecological and environmental processes affect the orientation, size, shape, and geometry of coral skeletons during coral growth history. The presence of these hiatus surfaces in other large coral heads would strongly impact sclerochronology and the interpretation of multiple environmental factors including sea surface temperature (SST).

Kang K. L. Liu, N. Lubbers, W. Klein et al.

The agent-based Yard-Sale model of wealth inequality is generalized to incorporate exponential economic growth and its distribution. The distribution of economic growth is nonuniform and is determined by the wealth of each agent and a parameter $λ$. Our numerical results indicate that the model has a critical point at $λ=1$ between a phase for $λ< 1$ with economic mobility and exponentially growing wealth of all agents and a non-stationary phase for $λ\geq 1$ with wealth condensation and no mobility. We define the energy of the system and show that the system can be considered to be in thermodynamic equilibrium for $λ< 1$. Our estimates of various critical exponents are consistent with a mean-field theory (see following paper). The exponents do not obey the usual scaling laws unless a combination of parameters that we refer to as the Ginzburg parameter is held fixed as the transition is approached. The model illustrates that both poorer and richer agents benefit from economic growth if its distribution does not favor the richer agents too strongly. This work and the accompanying theory paper contribute to understanding whether the methods of equilibrium statistical mechanics can be applied to economic systems.

Gillian L. Rapson

More than 30 years ago, the eminent British plant ecologist A. D. Bradshaw remarked that “restoration [was] an acid test for ecology” (Bradshaw, 1987). Of course, the ecology he was referring to was that of community succession and consequently assembly. Two recent books, Primer of Ecological Restoration and Comparative Plant Succession among Terrestrial Biomes of the World, serve to illustrate progress made on that point today, though from opposite ends of the theory–practice spectrum. Karen Holl’s little book is entitled Primer of Ecological Restoration, and it inducts the reader in a generally light, nonscientific way, equally accessible to practitioners of restoration, beginning students, and the general public. Accessibility is assisted by the short chapters, generally 10–12 pages each, within the attention span of even the least committed reader. A pair of introductory chapters outline humans’ motivations for restoration and define some terms. The restoration field is a terminological quagmire, to avoid which Holl supports a wider definition based on ecological integrity, sustainability, level of intervention, adaptive management, and social engagement. I prefer a simple definition of restoration, where restoration facilitates succession to a functional representation of the original ecosystem present on the site, though, as Holl points out, this is not always achievable and that it is probably not a useful definition in many anthropogenically modified parts of the world today, especially given the “shifting baselines” of Pauly (1995) and the plentiful alternate terminology for planting vegetation. Many useful hints about project management are covered in chapter 3, though the focus is on commercial-scale, funded projects, which are probably not the most common type of restoration projects. Actual methodology is not covered until chapter 9, and ecosourcing, which is increasingly being written into local and governmental legislation in New Zealand (e.g., Haines & Ferkins, 2007), is not even listed in the index. This reflects a more Americanized view of restoration than is perhaps practicable globally. Later chapters discuss more scientific aspects, such as adaptive management through monitoring and the role that poor ecological understanding plays in restoration failures, including consideration of disturbance regimes, a topic that dominates the thinking in Comparative Plant Succession among Terrestrial BIomes of the World. Scale, connectivity, and edges all receive mention, enlightening the general reader. Two chapters cover the main abiotic factors affecting restoration projects, especially landscape and soil and water issues. Of particular note is the tendency by restoration practitioners to perpetrate homogeneous plantings. These result in arrested successions, so much so that managers are retrospectively resorting to manual disturbances to create heterogeneity (e.g., Forbes et al., 2020). The problem of invasive species receives an entire chapter in the Primer, whereas a conclusion reached in Comparative Plant Succession is that invasive species are not a concern, especially in higher latitudes. This highlights a major dichotomy between restoration as facilitated succession versus natural plant succession, the causes of which are not immediately apparent, but they probably relate to the histories of anthropogenic disturbance. Indeed, this topic is one of the major motivations for Prach and Walker to write their book. Further, they define an unsuccessful succession as one where “[u]ndesirable weeds (ruderals) and often aliens dominant in later-successional stages” or there is “sparse or no vegetation” (p. 57), a situation which occurs in only 7% of their examples and closely matches the share of examples affected by invasive species (Table 16.3). Given this situation, it appears that natural succession is incapable of being unsuccessful, which makes some sense because, naturally, nature decides what success is. Hence, it is impossible to determine if there is a publication bias toward successful studies of succession! Faunal introductions (called reintroduction biology in New Zealand) are briefly covered in the Primer, acknowledging how closely linked all elements of the biota are in nature. Remaining chapters cover the repugnant but essential tasks of administering and financing projects, again useful for beginners and for those in the United States of America. In addition to the Primer itself, there are a suite of web pages that Karen Holl promises to maintain and update, and which are full of images, case studies, and other resources. This information is especially useful to those teaching restoration ecology at the tertiary level. Comparative Plant Succession is basically a very long scientific paper containing extensive meta-analyses of the interrelationships between Earth’s biomes and the different types of disturbances initiating succession. It incorporates 530 seres over 8 biomes and 10 types of disturbances. The problem for the authors was to form generalizations from the scattered, location-specific case studies abounding in the literature, in particular, with respect to invasive species (mentioned above), patterns of biodiversity, and successional trajectories. The profiles introducing biomes to the reader (>30 pages) are a little indigestible, though the climate diagrams here reward study, and with the distribution maps, overview each biome. Really part of the methods of the “paper,” these pages are especially useful to those unfamiliar with the concept of biomes or

Mark F. Baumgartner, Julianne Bonnell, Peter J. Corkeron et al.

Mitigating the effects of human activities on marine mammals often depends on monitoring animal occurrence over long time scales, large spatial scales, and in real time. Passive acoustics, particularly from autonomous vehicles, is a promising approach to meeting this need. We have previously developed the capability to record, detect, classify, and transmit to shore information about the tonal sounds of baleen whales in near real time from long-endurance ocean gliders. We have recently developed a protocol by which a human analyst reviews this information to determine the presence of marine mammals, and the results of this review are automatically posted to a publicly accessible website, sent directly to interested parties via email or text, and made available to stakeholders via a number of public and private digital applications. We evaluated the performance of this system during two 3.75-month Slocum glider deployments in the southwestern Gulf of Maine during the spring seasons of 2015 and 2016. Near real-time detections of humpback, fin, sei, and North Atlantic right whales were compared to detections of these species from simultaneously recorded audio. Data from another 2016 glider deployment in the same area were also used to compare results between three different analysts to determine repeatability of results both among and within analysts. False detection (occurrence) rates on daily time scales were 0% for all species. Daily missed detection rates ranged from 17 to 24%. Agreement between two trained novice analysts and an experienced analyst was greater than 95% for fin, sei, and right whales, while agreement was 83–89% for humpback whales owing to the more subjective process for detecting this species. Our results indicate that the presence of baleen whales can be accurately determined using information about tonal sounds transmitted in near real-time from Slocum gliders. The system is being used operationally to monitor baleen whales in United States, Canadian, and Chilean waters, and has been particularly useful for monitoring the critically endangered North Atlantic right whale throughout the northwestern Atlantic Ocean.