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... Ecological threshold is an important concept to indicate the boundary of alternate states of ecosystems driven by environmental conditions and to facilitate evaluation of ecosystem resilience. Sea-level rise (SLR) thresholds for the stability of salt marshes, if studied in two dimensions, are generally derived based on total areas without systematic accounting for spatial patterns related to edges ...
Thibaut Marin-Cudraz; Bertrand Muffat-Joly; Claude Novoa; Philippe Aubry; Jean-François Desmet; Mathieu Mahamoud-Issa; Florence Nicolè; Mark H. Van Niekerk; Nicolas Mathevon; Frédéric Sèbe
... The cost-effectiveness and reduced human effort employed in setting up acoustic monitoring in the field makes bioacoustics an appealing option for wildlife monitoring. This is especially true for secretive vocal species living in remote places. However, acoustic monitoring still raises questions regarding its reliability when compared to other, human-driven methods. In this study we compare differ ...
agricultural land; case studies; cluster analysis; environmental factors; environmental indicators; habitat fragmentation; humans; intensive farming; land use change; politics; prediction; Portugal
Abstract:
... The fragmentation of agricultural land is influenced by political, economic, social, ecological and environmental factors, which affect its dynamics, patterns, structures, and functions. However, a deep analysis aimed at examining agricultural land fragmentation and its driving forces, and predicting future agricultural land fragmentation is needed. We investigated the degree of fragmentation in a ...
agroecosystems; climate; climate change; environmental indicators; experts; issues and policy; models; planning; risk; risk management; surveys; sustainable agriculture; India
Abstract:
... The impending threats of changing climate have been well documented across sectors. The climate risks are best addressed through increasing adaptive capacity and building resilience. Ever since the global call during the Rio Summit in 1992 for establishing sustainability indicators across sectors, there have been several studies across the world on developing indicators for sustainability, vulnera ...
agrochemicals; conservation areas; endosulfan; environmental indicators; land use; livestock; macroinvertebrates; nutrient content; predators; risk; sediments; streams; surface water; Argentina
Abstract:
... The use of agrochemicals in Argentina has increased over the last decades and may represent an environmental risk for adjacent water bodies. In this work we study the invertebrate assemblages in nine streams sampled at 11 sites with different land use on the adjacent plots in the years 2011–2014. Four sites were located inside a biosphere reserve, 4 sites were located adjacent to livestock plots a ...
agroecosystems; beehives; bees; environmental indicators; good agricultural practices; honey; meta-analysis; monitoring; pesticide residues; pesticides; pollen; support vector machines; toxicity; Uruguay
Abstract:
... Three years pesticide residues monitoring data in pollen, wax, bees and honey from sentinel apiaries in different agroecosystems in Uruguay were used for meta analysis. Support vector machines (SVM) algorithm was used previously to classify environments and is the basis of the present work. An useful indicator was developed to classify the contamination status of both beehives and associated envir ...
cities; ecology; emergy; environmental indicators; geographic information systems; quantitative analysis; rivers; sediment transport; surface water; water management; watersheds; Yellow River
Abstract:
... The assessment of the eco-environmental benefits of rivers has important guiding significance for improving water resource management, establishing water resource protection mechanisms, and maintaining river health. In view of the current imprecise quantitative methods of determining the eco-environmental benefits of rivers and based on the viewpoint of ecology, the significance and composition of ...
analytical methods; case studies; developed countries; developing countries; environmental indicators; game theory; models; Africa; China; Japan
Abstract:
... Still influenced by the cold war thinking, many countries – especially looking to new rising powers – might interact in the international scenario through competition, instead than cooperation. However, China has seen more opportunities in cooperation than challenges in competition. Since 2013, Chinese president Xi Jinping pointed out clearly in various public occasions that this world has become ...
case studies; environmental indicators; group size; linear models; population dynamics; probability; surveys; wildlife management
Abstract:
... To facilitate the use of population counts as an index of population change, we describe a generalization of the distance sampling methodology to analyze, in addition to distance to the observer, two other ways to estimate imperfect detection probability: multiple observers and time-to-detection, in a flexible manner, meaning that not all sites or years need to have distance information or be surv ...
carbon; cities; environmental indicators; greenhouse gas emissions; industrial sites; land use change; local government; models; planning; quantitative analysis; regression analysis; river deltas; transportation; urban population; urbanization; China; Yangtze River
Abstract:
... Rapid urbanization with land use and cover change (LUCC) is making a substantially increasing contribution to global carbon emissions. Understanding the spatial processes and transitions mechanism of urban carbon metabolism system by LUCC could help local governments in regional spatial planning. Taking 13 cities in the Yangtze River Delta of China as examples, we quantitatively analyzed and mappe ...
United States Environmental Protection Agency; biomass; coasts; detritus; ecosystem management; ecosystems; environmental indicators; estuaries; fish; food webs; hydrodynamics; macroinvertebrates; models; river flow; temperature; watersheds; Iberian Peninsula
Abstract:
... An ecosystem model of the Minho estuary (NW coast of Iberian Peninsula) was implemented in AQUATOX 3.1 (US-EPA) to check whether the effects of temperature rise, dry years, rainy years and river flow decrease acting isolated (single stressor) or combined (multiple stressor) would induce the same type of response on macroinvertebrate biomass variation and to identify the type of stressor interactio ...
... Zostera marina flourish along the west coast of Cotentin, in cohabitation with extensive oyster cultivation. In 2016, seasonal sampling was carried out based on five combinations of conditions involving vegetated and unvegetated areas, presence or absence of oyster tables and a control station without either eelgrass or oyster cultivation. The sediments consisted of muddy sandy gravel and no signi ...
Bacillariophyceae; DNA; DNA barcoding; biological assessment; computer software; environmental indicators; genomics; high-throughput nucleotide sequencing; light microscopes; multidimensional scaling; nucleotide sequences; polymerase chain reaction; rivers; species identification; spring; water quality; Portugal
Abstract:
... Benthic diatom communities are used in the ecological assessment of Portuguese rivers through the calculation of an autecological index, the IPS (Indice de Polluosensibilité Spécifique), officially adopted for Portugal. This index requires a high level of taxonomic expertise for morphological identification of individuals at species level. Advances in genomics, such as the DNA metabarcoding combin ...
Capitella; aquaculture; environmental indicators; environmental quality; fish farms; habitats; information sources; monitoring; organic matter; protocols; sand; spatial variation; sulfides
Abstract:
... A range of different protocols and indices have been developed in recent years for the definition of Environmental Quality Standards in aquaculture. However, it can be difficult to compare these protocols or indices between different regions or different habitats due to spatial heterogeneity at different scales. We carried out a field study to estimate the effectiveness of experimental units (sedi ...
... For sustainability of a region, a holistic view is necessary to understand its dynamics and the conditions surrounding cities and beyond. Conservation activity indicators can be instrumental in this context, yet they can be simultaneously counterproductive in areas where intra-city sectionalisms exist. With regard to urban biodiversity, Singapore proposed an index to evaluate the biodiversity, eco ...
... Mercury (Hg) is a toxic metal subject to several international regulations. The European Water Framework Directive (WFD) established in 2008 an Environmental Quality Standard for biota (EQSbiota) at 0.02 µg.g−1 fresh weight. This standard is not always adapted, such as in French Guiana subjected to high natural background Hg levels and intensive illegal gold mining. Therefore, this study focuses o ...
... Water status is an important indicator of ecosystem health. Based on the spectral signatures of liquid water and other land surface features (e.g., soil and vegetation), many water-related spectral reflectance indices (WIs) have been developed to characterize the presence of liquid water. These WIs are widely used in agricultural and ecological applications including surface water body characteriz ...
aquatic habitat; case studies; ecosystems; environmental indicators; fish; fish communities; floodplains; functional diversity; invasive species; nutrient content; rivers; water quality; Illinois River; Mississippi River
Abstract:
... Large floodplain-river ecosystems are often highly modified to provide services that society desires, yet these modifications can limit an ecosystem’s ability to adapt to changing conditions. The adaptive capacity of an ecosystem, its general resilience, is a conceptual framework for considering how a system will respond to such changes. We sought to apply aspects of three general resilience princ ...
Neotropics; case studies; data collection; databases; ecosystems; markets; soil; species richness; Amazonia
Abstract:
... Ecological monitoring research relies heavily on signals to detect ecosystem changes, making the selection of indicators a crucial methodological requirement. Over the years, individual species and species assemblages have been widely used, thereby, giving rise to reference methods that support the detection of ecological indicators. One such method, the Indicator Value Analysis (IndVal), has been ...
... Among the different approaches developed to assess ecosystem services (ES), the capacity matrix is flexible and quick to implement. The matrix is a look-up table that assigns each ecosystem type a score expressing its ES capacity. Using expert elicitation enables resource efficient and integrative ES scoring that can meet general demand for ES mapping and assessment at different scales. There is a ...