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排序方式: 共有879条查询结果,搜索用时 31 毫秒
871.
Sequential sorption of lead and cadmium in three tropical soils 总被引:2,自引:0,他引:2
It is important to examine mechanisms of Pb and Cd sorption in soils to understand their bioavailability. The ability of three tropical soils to retain Pb, Cd, and Ca was evaluated. The objectives of this study were to (1) determine the extent to which soil sorption sites are metal specific, (2) investigate the nature of reactions between metals and soil surfaces, and (3) identify how metals compete for sorption sites when they are introduced to soils sequentially or concurrently. Lead was shown to be much less exchangeable than Cd and inhibited Cd sorption. Cadmium had little effect on Pb sorption, though both Ca and Cd inhibited the adsorption of Pb at exchange sites. Lead appears to more readily undergo inner-sphere surface complexation with soil surface functional groups than either Cd or Ca. Thus, regardless of when Pb is introduced to a soil, it should be less labile than Cd. 相似文献
872.
Rabbany Md Ghulam Mehmood Yasir Hoque Fazlul Sarker Tanwne Hossain Kh Zulfikar Khan Arshad Ahmad Hossain Mohammad Shakhawat Roy Rana Luo Jianchao 《Environmental science and pollution research international》2022,29(1):444-456
Environmental Science and Pollution Research - This study analyzes the effects of credit constraints on technical efficiency of Boro rice growers in the district of Pabna in Bangladesh. Using a... 相似文献
873.
Juan S. Vargas Soto Christopher Beirne Andrew Whitworth Juan Carlos Cruz Diaz Eleanor Flatt Ruthmery Pillco-Huarcaya Erik R. Olson Alejandro Azofeifa Guido Saborío-R Roberto Salom-Pérez Deiver Espinoza-Muñoz Leslie Hay Lawrence Whittaker Carmen Roldán Ricardo Bedoya-Arrieta Eben North Broadbent Péter K. Molnár 《Conservation biology》2022,36(2):e13813
Understanding how human modification of the landscape shapes vertebrate community composition is vital to understanding the current status and future trajectory of wildlife. Using a participatory approach, we deployed the largest camera-trap network in Mesoamerica to date to investigate how anthropogenic disturbance shapes the occupancy and co-occurrence of terrestrial vertebrate species in a tropical biodiversity hotspot: the Osa Peninsula, Costa Rica. We estimated species richness in different categories of land protection with rarefaction analysis and estimated the expected occupancy with a joint species distribution model that included covariates for anthropogenic disturbance, land protection, habitat quality, and habitat availability. Areas with the most stringent land-use protections (e.g., Corcovado National Park, 24 species [95% CI 23–25]) harbored significantly more species than unprotected areas (20 species [19.7–20.3]), mainly due to a reduced presence of large-bodied species of conservation concern in unprotected areas (e.g., jaguar Panthera onca and white-lipped peccary Tayassu pecari). Small-bodied generalist species, such as opossums (Didelphidae) and armadillos (Dasypus novemcinctus), in contrast, were more common at disturbed sites, resulting in a significant difference in vertebrate community composition between sites with low and high disturbance. Co-occurrence of species was also mainly associated with response to disturbance. Similar responses to disturbance create two groups of species, those whose site-level occupancy usually increased as anthropogenic disturbance increased and those whose estimated occupancy decreased. The absence of large-bodied species entails an important loss of ecological function in disturbed areas and can hinder forest development and maintenance. Efforts to protect and restore forested landscapes are likely having a positive effect on the abundance of some threatened species. These efforts, however, must be sustained and expanded to increase connectivity and ensure the long-term viability of the wildlife community. 相似文献
874.
Lawrence Jino Mohanadhas Berlin Narayanan Natarajan Kumar Alagarsamy Vanav Mangottiri Vasudevan Govindarajan Suresh Kumar 《Environmental science and pollution research international》2022,29(57):85922-85944
Environmental Science and Pollution Research - Subsurface contamination is a frequent occurrence in fractured porous systems, posing a potential threat for the groundwater contamination. Tracking... 相似文献
875.
Naveenkumar Rasaiah Ravichandran Manickam Mohanavel Vinayagam Karthick Alagar Aswin Lawrence Sundar Raj Leo Priyanka Swaminathan Shanmugasundaram Harini Kumar Sundramurthy Kiran Kumar Shanmugavelan Pradeep 《Environmental science and pollution research international》2022,29(7):9491-9532
Environmental Science and Pollution Research - The energy storage application plays a vital role in the utilization of the solar energy technologies. There are various types of the energy storage... 相似文献
876.
Laura K. Blamey Éva E. Plagányi Trevor Hutton Roy A. Deng Judy Upston Annie Jarrett 《Conservation biology》2022,36(3):e13864
Short-lived, fast-growing species that contribute greatly to global capture fisheries are sensitive to fluctuations in the environment. Uncertainties in exact stock–environment relationships have meant that environmental variability and extremes have been difficult to integrate directly into fisheries management. We applied a management strategy evaluation approach for one of Australia's large prawn stocks to test the robustness of harvest control rules to environmental variability. The model ensemble included coupled environmental-population models and an alternative catchability scenario fitted to historical catch per unit effort data. We compared the efficacy of alternative management actions to conserve marine resources under a variable environment while accounting for fisher livelihoods. Model fits to catch per unit effort were reasonably good and similar across operating models (OMs). For models that were coupled to the environment, environmental parameters for El Niño years were estimated with good associated precision, and OM3 had a lower AIC score (77.61) than the base model (OM1, 80.39), whereas OM2 (AIC 82.41) had a similar AIC score, suggesting the OMs were all plausible model alternatives. Our model testing resulted in a plausible subset of management options, and stakeholders selected a permanent closure of the first fishing season based on overall performance of this option; ability to reduce the risk of fishery closure and stock collapse; robustness to uncertainties; and ease of implementation. Our simulation approach enabled the selection of an optimal yet pragmatic solution for addressing economic and conservation objectives under a variable environment with extreme events. 相似文献
877.
Mohanty Trupti Rani Tiwari Nitish Kumar Kumari Suman Ray Archisman Manna Ranjan Kumar Bayen Supriti Roy Shreya Das Gupta Subhadeep Ramteke Mitesh Hiradas Swain Himanshu Sekhar Bhor Manisha Das Basanta Kumar 《Environmental science and pollution research international》2022,29(25):37498-37512
Environmental Science and Pollution Research - Aulacoseira granulata (Ehrenberg) Simonsen 1979 are considered as the eco-variable species which varies in density and diversity along with their... 相似文献
878.
Dehghani Mohammad Hadi Roy Sharmili Karri Rama Rao 《Environmental science and pollution research international》2022,29(57):85559-85561
Environmental Science and Pollution Research - 相似文献
879.
Environment, Development and Sustainability - Sustainability has emerged as a dominating paradigm across global institutions as a critical component for their prospects. Organisations all across... 相似文献