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

Sourav Chakma, Etal Chakma, Shahriar Caesar Rahman

Lucy Atkinson, Dorothy J. Dankel, Katherine D. Romanak

Environmental monitoring at geologic CO2 storage sites is required by regulations for the purposes of environmental protection and emissions accounting in the case of leakage to surface. However, another very important goal of environmental monitoring is to assure stakeholders that the project is monitored for safety and effectiveness. With current efforts to optimize monitoring for cost-effectiveness, the question remains: will optimization of monitoring approaches degrade stakeholder assurance, or do heavily-instrumented sites communicate higher risk to a stakeholder? We report the results of a stakeholder survey in Gulf Coast states of the US where carbon capture and storage (CCS) is developing quickly. We rely on a 2 by 2 factorial experiment in which we manipulate message complexity (complex v. simple) and social norm (support from scientists v. support from community members). Subjects were randomly assigned to one of four conditions: 1) complex message with scientist support; 2) complex message with community member support; 3) simple message with scientist support; or 4) simple message with community member support. In addition to the experimental stimuli, subjects were also asked about their need for cognition, attitudes toward science and scientists, attitudes about climate change and support for carbon capture and storage (CCS). Our sample is drawn from residents in states bordering the western Gulf of Mexico (Texas, Louisiana, Florida) where CO2 geologic storage is being planned both onshore and offshore. The results offer important implications for public outreach efforts to key stakeholders.

Stephanie R. Januchowski‐Hartley, Merryn Thomas, Rochelle Bristol et al.

Abstract The last several decades have seen a rise in efforts to remove weirs, but there is little research investigating how projects are carried out, potential areas for improvement, or sharing of lessons to facilitate reconnection of more rivers. The aim of the study presented here was to explore how people involved in weir remediation perceive project processes, factors that facilitate or hinder action implementation, and possible ways processes could be improved to reconnect more rivers. We carried out semi‐structured interviews with people (n = 11) who had been actively involved in weir remediation processes in the Severn River Catchment, United Kingdom, and used their responses to create a group mental model. The group mental model was created to support learning and communication about weir remediation projects between individuals and groups. We found broad agreement from those involved in creating the group mental model about weir remediation project processes and potential areas for improvement. One of the only points of divergence within the group mental model was associated with the impact of different weir remediation actions, particularly weir removal. Based on the group mental model, we set out three calls to action to reconnect more rivers in the UK. First, move beyond opportunistic projects and establish national goals and catchment‐scale plans for weir remediation. Second, reform fish passage legislation and legislate weir ownership. Doing so would support more effective remediation solutions by recognizing the diversity of fish species that reside in UK rivers and help mitigate risks from hazardous weirs through owner accountability. Third, build cross‐sector and public partnerships to encourage removal or improved fish pass designs. We direct the three calls to action to policy makers and anyone already engaged in or envisioning weir remediation projects in the UK. The calls also have potential implications and relevance to people in other countries in Europe and beyond.

Stuart C. Painter, Yuri Artioli, Fathimath Hana Amir et al.

Nitrogen pollution is a widespread and growing problem in the coastal waters of South Asia yet the ecological impacts on the region’s coral ecosystems are currently poorly known and understood. South Asia hosts just under 7% of global coral reef coverage but has experienced significant and widespread coral loss in recent decades. The extent to which this coral ecosystem decline at the regional scale can be attributed to the multiple threats posed by nitrogen pollution has been largely overlooked in the literature. Here, we assess the evidence for nitrogen pollution impacts on corals in the central Indian Ocean waters of India, Sri Lanka and the Maldives. We find that there is currently limited evidence with which to clearly demonstrate widespread impacts on coral reefs from nitrogen pollution, including from its interactions with other stressors such as seawater warming. However, this does not prove there are no significant impacts, but rather it reflects the paucity of appropriate observations and related understanding of the range of potential impacts of nitrogen pollution at individual, species and ecosystem levels. This situation presents significant research, management and conservation challenges given the wide acceptance that such pollution is problematic. Following from this, we recommend more systematic collection and sharing of robust observations, modelling and experimentation to provide the baseline on which to base prescient pollution control action.

Xiaochen Zhao, Victor H. Rivera-Monroy, Chunyan Li et al.

Environmental temperature is a widely used variable to describe weather and climate conditions. The use of temperature anomalies to identify variations in climate and weather systems makes temperature a key variable to evaluate not only climate variability but also shifts in ecosystem structural and functional properties. In contrast to terrestrial ecosystems, the assessment of regional temperature anomalies in coastal wetlands is more complex since the local temperature is modulated by hydrology and weather. Thus, it is unknown how the regional free-air temperature (TFree) is coupled to local temperature anomalies, which can vary across interfaces among vegetation canopy, water, and soil that modify the wetland microclimate regime. Here, we investigated the temperature differences (offsets) at those three interfaces in mangrove-saltmarsh ecotones in coastal Louisiana and South Florida in the northern Gulf of Mexico (2017–2019). We found that the canopy offset (range: 0.2–1.6°C) between TFree and below-canopy temperature (TCanopy) was caused by the canopy buffering effect. The similar offset values in both Louisiana and Florida underscore the role of vegetation in regulating near-ground energy fluxes. Overall, the inundation depth did not influence soil temperature (TSoil). The interaction between frequency and duration of inundation, however, significantly modulated TSoil given the presence of water on the wetland soil surface, thus attenuating any short- or long-term changes in the TCanopy and TFree. Extreme weather events—including cold fronts and tropical cyclones—induced high defoliation and weakened canopy buffering, resulting in long-term changes in canopy or soil offsets. These results highlight the need to measure simultaneously the interaction between ecological and climatic processes to reduce uncertainty when modeling macro- and microclimate in coastal areas under a changing climate, especially given the current local temperature anomalies data scarcity. This work advances the coupling of Earth system models to climate models to forecast regional and global climate change and variability along coastal areas.

Yifei Jiang, Jihai Dong, Jihai Dong et al.

As one of the important submesoscale instabilities, symmetric instability (SI) widely exists in the ocean surface mixed layer (SML), which enhances the vertical material transport in the SML and also the exchanges between the SML and the ocean interior. Due to the small spatial scales of SI, O (10 m–1 km), which are not resolved by most current ocean models, the application of SI parameterization is an alternative choice in the coming decades to include the SI effects in ocean models and improve the model performance. In this study, we evaluate the impacts of SI in a realistic configuration with the SI parameterization scheme applied in the Xisha-Zhongsha waters, South China Sea in winter by using the Coastal and Regional Ocean Community Model (CROCO) version of the Regional Ocean Modeling System. Compared to the SI-lacking case, the SI energy source, the geostrophic shear production, is increased and elimination of anticyclonic potential vorticity is revealed in the SI-parameterized case. According to the energy analysis, multi-scale interactions are also influenced by the SI. The effective wind energy input is reduced, and the potential energy release in the SML is suppressed. Moreover, the SI scheme makes the SML depth shallower and closer to the reanalysis one. This work demonstrates a good performance of the SI scheme applied in regional models in representing SI effects.

Simplicious J. Gessa, Jessica M. Rothman

Abstract A conundrum of wildlife tourism is balancing wildlife conservation and tourist satisfaction. Mountain gorillas (Gorilla beringei) are a flagship species for biodiversity and there is worldwide interest in gorilla trekking safaris. This tourism provides substantial revenue to the government and local communities for gorilla protection, but puts them in danger of zoonotic diseases. To minimize disease transmission, health guidelines are in place for visitors whereby they are asked to remain 7 m from the endangered apes and stay in a cohesive group. Unfortunately, tourists often do not follow these rules and consequently their behavior puts gorillas at risk. The pre‐trekking messages presented to tourists in Bwindi Impenetrable National Park, Uganda were changed to determine if the way messages are stated affects visitor adherence to rules. Tourists (n = 389) either received strategic messages that were positively or negatively framed in relation to expectations to follow specific rules to adhere to health guidelines, and tourist behavior was measured, such as the nearest distance they were to gorillas, and their cohesiveness. Using generalized linear mixed models, it was found that framing messages affected tourist behavior. Tourists who received a negatively framed message had a higher adherence to rules than those who received a positive or control message. They were 75% further from the gorillas (7.26 vs. 4.52 m), more cohesive (0.40 vs. 0.81 m to each other), and approached the gorillas less (0.34 vs. 1.32 times) than the control message. These findings demonstrate that communicating in different ways promotes changes in behavior by tourists, which reduces the chances of epizootic respiratory infections being passed to vulnerable animals. Strategic message framing should be widely considered as a cost‐effective mechanism to promote behavior change during ecotourism.

Enikő Horváth, Martina Martvoňová, Stanislav Danko et al.

The European pond turtle (Emys orbicularis) is the only native freshwater turtle species in Slovakia. Due to watercourse regulations in the middle of the 20th century, its range became fragmented and, currently, there are only two isolated populations. From a total of 1,236 historical records in Slovakia, most observations (782 records) came from the area of the Tajba National Nature Reserve (NNR). Three of the population viability analysis models (‘baseline’, ‘catastrophe’, ‘nest protection during a catastrophe’) indicated the extinction of the population in Tajba, with the highest probability of extinction occurring during a catastrophic event (probability of extinction 1.00). We also evaluated information about the activity patterns of seven radio-tracked individuals and about the number of destroyed nests from the area. During the period 2017–2021, we recorded only two turtles leaving the aquatic habitat of Tajba. An alarming fact is the massive number of destroyed nests found in the area during the study period (Tajba 524; Poľany 56). Our results indicate that the population in the Tajba NNR require immediate application of management steps to ensure its long-term survival.

Zhaohui Aleck Wang, Hassan Moustahfid, Amy V. Mueller et al.

Advancing our understanding of ocean biogeochemistry, biology, and ecosystems relies on the ability to make observations both in the ocean and at the critical boundaries between the ocean and other earth systems at relevant spatial and temporal scales. After decades of advancement in ocean observing technologies, one of the key remaining challenges is how to cost-effectively make measurements at the increased resolution necessary for illuminating complex system processes and rapidly evolving changes. In recent years, biogeochemical in situ sensors have been emerging that are threefold or more lower in cost than established technologies; the cost reduction for many biological in situ sensors has also been significant, although the absolute costs are still relatively high. Cost savings in these advancements has been driven by miniaturization, new methods of packaging, and lower-cost mass-produced components such as electronics and materials. Recently, field projects have demonstrated the potential for science-quality data collection via large-scale deployments using cost-effective sensors and deployment strategies. In the coming decade, it is envisioned that ocean biogeochemistry and biology observations will be revolutionized by continued innovation in sensors with increasingly low price points and the scale-up of deployments of these in situ sensor technologies. The goal of this study is therefore to: (1) provide a review of existing sensor technologies that are already achieving cost-effectiveness compared with traditional instrumentation, (2) present case studies of cost-effective in situ deployments that can provide insight into methods for bridging observational gaps, (3) identify key challenge areas where progress in cost reduction is lagging, and (4) present a number of potentially transformative directions for future ocean biogeochemical and biological studies using cost-effective technologies and deployment strategies.

Manaranjan Das, Subrat Debata

The Yellow-rumped Flycatcher Ficedula zanthopygia is an extremely rare bird and historically recorded from two localities in central India and southern India. We record its sighting from Kuldiha Wildlife Sanctuary of Odisha, eastern India. This offers an opportunity for additional survey throughout the recorded localities to explain its wintering status in India.

Bradley F. Blackwell, Travis L. DeVault

Avery A. Cook, Terry A. Messmer, Michael R. Guttery

ABSTRACT A potential consequence of climate change, altered fire regimes, and a legacy of resource exploitation in western North America is increased displacement of desirable sagebrush (Artemisia spp.) communities by invasive plant species. Annually, an estimated 90,000 ha of sage‐grouse (Centrocercus spp.) habitat is degraded by pinyon (Pinus spp.) and juniper (Juniperus spp.; PJ) encroachment. Sage‐grouse responses to conifer encroachment may include avoidance of otherwise available habitats, lek abandonment, and subsequent population declines. Thus, restoration of PJ encroached sage‐grouse habitats that exhibit intact sagebrush understories is a priority conservation action. However, better information is needed regarding sage‐grouse response to these management actions. We used sage‐grouse fecal pellet surveys and radiotelemetry location data to identify vegetation and landscape attributes that may influence sage‐grouse use of PJ removal treatments completed using mechanical methods. Use of PJ removal treatments by sage‐grouse was positively associated with irrigated pasture and alfalfa (Medicago sativa) hay within 1 km (β = 7.69, SE = 5.58, P = 0.17) and negatively associated with PJ canopy cover (β = −1.52, SE = 0.84, P = 0.07) within 500 m of treatments. Percent cover of mesic habitats and sagebrush canopy were greater within 1 km of treatments where sage‐grouse were detected; however, these relationships were weak because of large variability in conditions across sites. Our results document sage‐grouse use of 9 of 16 mechanical PJ removal treatments examined in an encroached sagebrush landscape and suggest that mechanical PJ removal treatments should be sited adjacent to occupied sage‐grouse habitat in areas that minimize surrounding PJ cover. © 2017 The Wildlife Society.

Christopher Michael Johnson, Christopher Michael Johnson, Christopher Michael Johnson et al.

The distribution and use of pelagic habitat by sperm whales (Physeter macrocephalus) is poorly understood in the south-eastern Indian Ocean off Western Australia. However, a variety of data are available via online portals where records of historical expeditions, commercial whaling operations, and modern scientific research voyages can now be accessed. Crowdsourcing these online data allows collation of presence-only information of animals and provides a valuable tool to help augment areas of low research effort. Four data sources were examined, the primary one being the Voyage of the Odyssey expedition, a five-year global study of sperm whales and ocean pollution. From December 2001-May 2002, acoustic surveys were conducted along 5,200 nautical miles of transects off Western Australia including the Perth Canyon and historical whaling grounds off Albany; 60 tissue biopsy samples were also collected. To augment areas not surveyed by the RV Odyssey, historical Yankee whaling data (1712-1920), commercial whaling data (1904-1999), and citizen science reports of sperm whale sightings (1990-2003) were used. Using Maxent, a species distribution modeling tool, we found that the submarine canyons off Albany and Perth provide important habitat for sperm whales. Current technology, along with current understanding of sperm whale bioacoustics and habitat preferences, provides strong motivation for undertaking long-term passive acoustic studies that can monitor the sperm whale population within Australia’s EEZ waters (Perth and Albany canyons) as a way of informing future marine management and policy decisions.

Kenneth Able

Our understanding of the early life history of fishes and their habitats has proceeded from basic natural history to ecology, but we often need to return to natural history to address deficiencies in conceptual and quantitative models of ecosystems. This understanding is further limited by the complex life history of fishes and the lack of appreciation of shifting baselines in estuaries. These inadequacies are especially evident when we try to address the effects of human influences, e.g. fishing, urbanization, and climate change. Often our baselines are inadequate or inaccurate. Our work has detected these along the coasts of the U.S. in extensive time series of larval fish ingress into estuaries, studies of the effects of urbanization, and responses to catastrophes such as the BP oil spill. Long-term monitoring, especially, continues to provide critical insights

Celso Alves, Olivier Thomas

In the last decades, nature has played a significant role as source of new drugs and recent trends in medicines research emphasize that marine environment has a high potential for discovery of new pharmaceutical compounds. Harsh chemical and physical conditions in the marine environment provide a production of quite specific and potent active molecules. The aim of this study was to evaluate the antitumor activity of isolated fractions obtained from seaweed Fucus spiralis on three human tumor cell lines (HepG-2; MCF-7; SH-SY5Y). In this study, five fractions obtained by Vacuum Liquid Chromatography (VLC) from <i>Fucus spiralis</i> methanolic extracts were tested on HepG-2, MCF-7 and SH-SY5Y cells through cytotoxicity and anti-proliferative assays. The results were obtained the according MTT method. The highest cytotoxicity was exhibited by F3 fraction on HepG-2 cells and by F1 and F5 fractions on SH-SY5Y cells, reduced the cells viability (1 mg/ml; 24 hours) in 83%, 97% and 91%, respectively. The smallest IC50 was exhibited by F1 fraction on SH-SY5Y with 308.0µg/ml. In cell proliferation assays, F1, F3, F4 and F5 fractions showed anti-proliferative activity on all cell lines tested. (1 mg/ml; 24 hours). However, the effects were more marked on HepG-2 and SH-SY5Y cells. The smallest IC50 was exhibited on SH-SY5Y cells by F1 and F3 fraction with an IC50 of 153.2 and 136.4µg/ml, respectively. In conclusion, <i>Fucus spiralis</i> is a promising source of new molecules with therapeutically applications in cancer.

T.C. Narendran, F.R. Khan

Two new species of Chalcididae viz. Psilochalcis mathuraensis sp. nov. and Brachymeria neoatteviae sp. nov. are described and compared with similar species. Illustrations of important features are provided.