The ease of application and effectiveness of a multimetric benthic index of biotic integrity (B-IBI) was evaluated for use as an ecological integrity monitoring tool in coastal National Parks of Canada. The B-IBI was developed in three phases: 1) analysis of land use impacts to select study watersheds along a gradient of disturbance; 2) collection and identification of benthic macroinvertebrate...

In recent years, Multimetric Indices (MMIs) have received a lot of attention thanks to their ability develop integrative evaluations water quality, particularly in lagoons. this article, we propose new MMI for determining the quality The proposed index is composed biotic and abiotic indicators, particular macroinvertebrates, macrophytes morphological indicators. based on geometric representatio...

Biotic resistance is the ability of species in a community to limit the invasion of other species. However, biotic resistance is not widely used to control invasive plants. Experimental, functional, and modeling approaches were combined to investigate the processes of invasion by Ageratina altissima (white snakeroot), a model invasive species in South Korea. We hypothesized that (1) functional ...

the gamasiab river has one of the highest discharge in the western iran receiving wastewater of trout frames. the present study investigated effects of wastewater using bioassessment of benthic organisms. the benthos were sampled over four seasons using a surber sampler on four stations, upstream, on the farm outlet, 500 and 1000 m down the farm outlet. 5454 benthic fauna were identified that w...

Stated preference surveys often give minimal attention to distinctions between intermediate and final ecosystem services, leading to the potential for biased or ambiguous welfare estimates. This paper illustrate ways in which multimetric ecological indexes of the type developed in the ecological literature, here an index of biotic integrity, can be used in stated preference scenarios to both im...

Biotic indexes are one of several types of measures that are routinely used in biological monitoring in temperate streams and offer interesting possibilities to assess the environmental quality of rivers in the neotropics. Macroinvertebrate communities of seven southeastern Nicaraguan streams were monitored and seven ecological indexes were applied. The results suggest that information from the...

Global environmental change is altering the patterns of biodiversity worldwide. Observation and theory suggest that species' distributions and abundances depend on a suite of processes, notably abiotic filtering and biotic interactions, both of which are constrained by species' phylogenetic history. Models predicting species distribution have historically mostly considered abiotic filtering and...