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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 16 of 16 for “"freshwater biodiversity"”.
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Conservation of freshwater biodiversity in key areas of the Colombian Amazon
Freshwater ecosystems maintain incredible ecological processes that support millions of species, including human beings. Important goods and services ranging from food and building materials to water cleansing, flood and erosion control, cycling of nutrients and flow of energy are provided. With …
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Enhancing the conservation of freshwater biodiversity through improved freshwater conservation planning techniques
Freshwater ecosystems and biota are among the most endangered in the world. This current situation is even more disturbing when future threats of escalating human demand and global climate change are considered. Urgent measures are therefore needed to conserve freshwater ecosystems and sustain the …
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Ecotourism and engagement with freshwater biodiversity: a case study of three Scottish lochs
Ecotourism can be an effective tool for biodiversity conservation, as a way to connect people and nature though increased engagement and environmental education, with the ultimate aim to increase support for conservation, and provide benefits to local communities. It is seldom a focus in freshwater …
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Science into action: the challenge of effective knowledge exchange in freshwater biodiversity management
Freshwater biodiversity is facing an acute crisis. Their isolation and disconnection make them particularly susceptible to anthropogenic pressures including habitat loss and degradation, pollution, overexploitation, invasive species, wildlife crime, and climate change. These have resulted in a …
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An integrated planning approach for the conservation of freshwater ecosystems in South Africa
Freshwater ecosystems underpin the fabric of society and the environment, providing essential ecosystem services such as water and food, upon which all human beings depend. In order to secure these vital services requires the sustainable management of freshwater ecosystems. At present however, …
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Patterns of Taxonomic, Functional, and Phylogenetic Diversity, and Ecological Drivers of Stream Fish Assemblages in East Texas
<p>Freshwater ecosystems in East Texas contain a rich freshwater biodiversity, with the Neches and Sabine River basins supporting some of the greatest freshwater fish diversity in the state. Given the heterogeneity of habitats and species diversity, these rivers serve as excellent natural systems …
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The impacts of climate change on freshwater microbes: Insights from the field to the laboratory
… is currently one of the greatest threats to freshwater biodiversity. The microbial diversity within freshwaters is phylogenetically and functionally diverse. Yet, the impacts of warming on these complex communities are largely unknown. To date, the vast majority of research ignores the …
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Fairy shrimp (Anostraca) in the vernal pools of Eastern Washington
… year. Though important habitats and sources of freshwater biodiversity, they are little accounted for in wetland conservation and restoration practices. Like much of the world’s wetlands, they have seen a significant decline from anthropogenic impacts and conversion for alternative land use. …
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IMPROVING THE ASSESSMENT OF SPREAD AND IMPACTS OF FRESHWATER INVASIVE SPECIES
Freshwater habitats occupy a small fraction of Earth’s surface, but they host 6-10% of global biodiversity and are considered endemism hotspots. Moreover, they provide ecological services for more than 6 billion people worldwide, thus their conservation is particularly relevant to preserve both …
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Nutrient enrichment modulates the structure and temporal assembly of riverine benthic algal and macroinvertebrate assemblage.
… most widespread anthropogenic forces impacting freshwater biodiversity worldwide. Stream communities are frequently limited by nutrient availability, and enrichment over natural concentrations can impact both the distribution of species and the temporal assembly of natural communities. By …
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The Role of Images in Freshwater Conservation in South Africa: An Analysis of Images and Perceptions of Freshwater Fish
Freshwater biodiversity is highly threatened, but under-represented in media, and less well known than marine and terrestrial counterparts. The current lack of public awareness of freshwater species and ecosystems may limit freshwater conservation as a popular cause. The manner in which species are …
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Studies on the Odonata and Trichoptera of high-elevation lakes of northern Colorado and southern Wyoming
Freshwater biodiversity loss is a major concern, and global warming is already causing a significant role in species extinctions. The main goal of this research was to provide a baseline for specific aquatic insect species distributions at high-elevation lentic habitats in Northcentral Colorado and …
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Trajectories of Change in South Africa's Freshwater Fish Fauna
In South Africa, freshwaters are the most threatened ecosystems in the country, facing pressure from water abstraction, land-use change, pollution, invasive species and climate change. These anthropogenic pressures are directly impacting the diversity, abundance, and survival of freshwater fauna …
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INVASION DYNAMICS OF FRESHWATER CRAYFISH IN A MAN-DOMINATED LAND: SPATIO-TEMPORAL, ECOLOGICAL AND HUMAN DIMENSIONS
… invasions are among the leading threats to freshwater biodiversity, yet predicting their dynamics and mitigating their impacts remains challenging, especially in human-dominated landscapes where human-aided dispersal is highly possible. This thesis in particular advances understanding of …
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The Influence of Reduced Forest Cover and Dissolved Oxygen on the Viability of Eggs from Eastern Hellbenders (<i>Cryptobranchus alleganiensis</i>)
Riparian deforestation is a significant threat to freshwater riverine ecosystems and sensitive fauna that depend on clean water. Sensitive aquatic species are vulnerable to the destruction of riparian forest cover which diminishes protection from pollutants, sedimentation, and solar radiation, …
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Conservation of an endangered amphibian: the case of the Natterjack toad (Epidalea calamita) in Ireland
Amphibians have been declining globally since at least the 1970s and are the most endangered class of vertebrates with over 40% of species threatened with extinction. The Natterjack toad (Epidalea calamita) is the rarest amphibian in Ireland, regionally Red-listed as Endangered. The species is …