نتایج جستجو برای: fish biodiversity
تعداد نتایج: 138899 فیلتر نتایج به سال:
Understanding trends in the diverse resources provided by large rivers will help balance tradeoffs among stakeholders and inform strategies to mitigate the effects of landscape scale stressors such as climate change and invasive species. Absent a cohesive coordinated effort to assess trends in important large river resources, a logical starting point is to assess our ability to draw inferences ...
No waters left untouched We are increasingly aware of human impacts on biodiversity across our planet, especially in terrestrial and marine systems. know less about fresh waters, including large rivers. Su et al. looked such systems globally, focusing several key measures fish biodiversity. They found that half all river have been heavily affected by activities, with only very tropical basins r...
One of the key concerns for enabling sustainable use natural resources is biodiversity and its conservation. Fish make up most varied group vertebrates they are considered to be a reliable indication water pollution. Humans causing an increasing loss in aquatic ecosystems, which likely have detrimental impact on ecosystem functioning, services, resistance future environmental change. Overfising...
Environmental hazards such as the destruction of habitats of endemic fish are one of the obvious challenges on the southern shores of the Caspian Sea. This research, which has been written by descriptive-analytical method and using the approach of interdisciplinary research, seeks to examine the strategies of the criminal justice system in this regard and in Guilan province. Degradation, illega...
AIM An often-invoked benefit of high biodiversity is the provision of ecosystem services. However, evidence for this is largely based on data from small-scale experimental studies of relationships between biodiversity and ecosystem function that may have little relevance to real-world systems. Here, large-scale biodiversity datasets are used to test the relationship between the yield of inland ...
Fish Biodiversity of the Vitória-Trindade Seamount Chain, Southwestern Atlantic: An Updated Database
Despite a strong increase in research on seamounts and oceanic islands ecology and biogeography, many basic aspects of their biodiversity are still unknown. In the southwestern Atlantic, the Vitória-Trindade Seamount Chain (VTC) extends ca. 1,200 km offshore the Brazilian continental shelf, from the Vitória seamount to the oceanic islands of Trindade and Martin Vaz. For a long time, most of the...
In the last few years, the study of environmental DNA (eDNA) has drawn attention for many reasons, including its advantages for monitoring and conservation purposes. So far, in aquatic environments, most of eDNA research has focused on the detection of single species using species-specific markers. Recently, species inventories based on the analysis of a single generalist marker targeting a lar...
Understanding changes in biodiversity requires the implementation of monitoring programs encompassing different dimensions of biodiversity through varying sampling techniques. In this work, fish assemblages associated with the "outer" and "inner" sides of four marinas, two at the Canary Islands and two at southern Portugal, were investigated using three complementary sampling techniques: underw...
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