scholarly journals How Do Biological and Functional Diversity Change in Invaded Tropical Marine Rocky Reef Communities?

Diversity ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 353
Author(s):  
Larissa M. Pires-Teixeira ◽  
Vinicius Neres-Lima ◽  
Joel C. Creed
Keyword(s):  
Functional Diversity ◽  
Biological Diversity ◽  
Species Abundance ◽  
Functional Space ◽  
Taxonomic Diversity ◽  
Diversity Indices ◽  
Rocky Reef ◽  
Rocky Shores ◽  
Distribution Models ◽  
Functional Diversity Indices

Evidence so far shows that most alien species (AS) have negative impacts on native biodiversity and are changing biodiversity in almost all environments. Here, we study eight rocky shores at four sites containing reefs with invaded communities and other not-invaded (control) communities, to evaluate the effects of four marine invasive species on biological and functional diversity. We used the adjustment and selection approach of species abundance distribution models (SAD), taxonomic diversity indices and functional diversity indices based on hierarchical grouping matrices (FD—Functional Diversity). In addition to comparing invaded and not-invaded communities, we also performed the same analysis, but removed the invaders (AS removed) from the matrices. The geometric-series model was best adjusted to the majority of communities. The diversity indices suggest that the taxonomic diversity is lower in invaded communities, while the functional diversity indices suggest a change in the functional space of invaded and not-invaded communities, with a greater amount of functional space filled by species in the not-invaded communities. Taxonomic and functional diversity indices were successful in identifying processes that determine the biological diversity of invaded communities, as they seem to obey a pattern that reflects the reduced diversity of invaded communities.

scholarly journals Characterization of the Multidimensional Functional Space of the Aquatic Macroinvertebrate Assemblages in a Biosphere Reserve (Central México)

Diversity ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 546
Author(s):  
Alexis Joseph Rodríguez-Romero ◽  
Axel Eduardo Rico-Sánchez ◽  
Jacinto Elías Sedeño-Díaz ◽  
Eugenia López-López
Keyword(s):  
Functional Diversity ◽  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Functional Space ◽  
Diversity Indices ◽  
Environmental Indices ◽  
Macroinvertebrate Assemblages ◽  
Functional Richness ◽  
Functional Diversity Indices

The analysis of functional diversity has shown to be more sensitive to the effects of natural and anthropogenic disturbances on the assemblages of aquatic macroinvertebrates than the classical analyses of structural ecology. However, this ecological analysis perspective has not been fully explored in tropical environments of America. Protected Natural Areas (PNAs) such as biosphere reserves can be a benchmark regarding structural and functional distribution patterns worldwide, so the characterization of the functional space of biological assemblages in these sites is necessary to promote biodiversity conservation efforts. Our work characterized the multidimensional functional space of the macroinvertebrate assemblages from an ecosystemic approach by main currents, involving a total of 15 study sites encompassing different impact and human influence scenarios, which were monitored in two contrasting seasons. We calculated functional diversity indices (dispersion, richness, divergence, evenness, specialization, and originality) from biological and ecological traits of the macroinvertebrate assemblages and related these indices to the physicochemical characteristics of water and four environmental indices (Water Quality Index, habitat quality, Normalized Difference Vegetation Index, and vegetation cover and land use). Our results show that the indices of functional richness, evenness, and functional specialization were sensitive to disturbance caused by salinization, concentration of nutrients and organic matter, and even to the occurrence of a forest fire in the reserve during one of the sampling seasons. These findings support the conclusion that the changes and relationships between the functional diversity indices and the physicochemical parameters and environmental indices considered were suitable for evaluating the ecological conditions within the reserve.

Functional diversity on rocky shores of the SW Atlantic: sewage effluents influence and mask the effects of the latitudinal gradient

2020 ◽  
Vol 648 ◽  
pp. 39-49
Author(s):  
GV Garaffo ◽  
EN Llanos ◽  
MA Saracho Bottero ◽  
E Hines ◽  
R Elías ◽  
...  
Keyword(s):  
Functional Diversity ◽  
Latitudinal Gradient ◽  
Diversity Indices ◽  
Rocky Shores ◽  
Quadratic Entropy ◽  
Sewage Effluents ◽  
Macrobenthic Assemblages ◽  
Sw Atlantic ◽  
Functional Diversity Indices ◽  
Rao’S Quadratic Entropy

Rocky shores are a transitional ecosystem between land and marine environments, and, together with other benthic coastal habitats, have a diverse macrobenthic community. Although there is enough information about the taxonomic diversity of Argentinean rocky shores, studies with a functional approach are scarce. We applied biological traits analysis and functional diversity indices to evaluate the geographic variation of the functional diversity of macrobenthic assemblages on rocky shores along a latitudinal gradient in the SW Atlantic (from 37° to 50°S). A total of 11 beaches with rocky hard substrate belonging to 2 biogeographical provinces (Magellanic and Argentinean) were studied during April 2016. The trait composition of macrobenthic assemblages and functional diversity indices (Rao’s quadratic entropy) varied significantly along the Argentinean coast, suggesting that the latitudinal gradient influences the distribution of species with respect to combinations of trait modalities. Rao’s quadratic entropy, species richness, evenness, and Shannon-Wiener diversity showed a pattern with higher values in the sites located in high latitudes. The functional diversity patterns found coincide with the biogeographical provinces. The presence of intertidal sewage effluents considerably influence functional diversity and mask the effects of the latitudinal gradient on the macrobenthic communities on rocky shores.

scholarly journals FUNCTIONAL DIVERSITY AND ITS ATTRIBUTE FACTORS IN THE YUNMENG MOUNTAIN NATIONAL FOREST PARK IN BEIJING, CHINA

CERNE ◽  
2017 ◽  
Vol 23 (1) ◽  
pp. 75-84
Author(s):  
Jin-Tun Zhang ◽  
Xiaohang Bai ◽  
Dan Shao
Keyword(s):  
Functional Diversity ◽  
Altitudinal Gradient ◽  
Soil Depth ◽  
Functional Divergence ◽  
Diversity Indices ◽  
Slope Position ◽  
National Forest ◽  
Forest Communities ◽  
Forest Park ◽  
Functional Diversity Indices

ABSTRACT The interaction of diversity with environmental gradients is an important topic in ecology. This study investigated the pattern of change in functional diversity in forest communities along an altitudinal gradient in Yunmeng Mountain National Forest Park, China. Forty-two quadrats measuring 10 x 10 m in the forest communities were set up along this altitudinal gradient; plant species, traits and environmental variables were measured and recorded. Six functional diversity indices, namely, Modified functional attribute diversity (MFAD), Functional diversity plot-based dendrogram index (FDp), Functional diversity community-based dendrogram index (FDc), Functional evenness (FEve), Functional divergence (FDiv) and Functional dispersion (FDis), were used to calculate functional diversity. The results showed that functional diversity varied greatly in forest communities in the Yunmeng Mountain Forest Park. Functional diversity was significantly correlated with elevation and slope position and somewhat correlated with soil depth. Functional diversity increased with an increase in the elevation and decreased as the slope position changed from valley bottom to hill ridge. Functional diversity was closely related to species richness. The six functional diversity indices were all applicable to functional diversity studies of forest communities.

NEW MULTIDIMENSIONAL FUNCTIONAL DIVERSITY INDICES FOR A MULTIFACETED FRAMEWORK IN FUNCTIONAL ECOLOGY

Ecology ◽  
2008 ◽  
Vol 89 (8) ◽  
pp. 2290-2301 ◽  
Author(s):  
Sébastien Villéger ◽  
Norman W. H. Mason ◽  
David Mouillot
Keyword(s):  
Functional Diversity ◽  
Diversity Indices ◽  
Functional Ecology ◽  
Functional Diversity Indices

scholarly journals Functional Diversity in Ferns Is Driven by Species Richness Rather Than by Environmental Constraints

2021 ◽  
Vol 11 ◽  
Author(s):  
Daniela Aros-Mualin ◽  
Sarah Noben ◽  
Dirk N. Karger ◽  
César I. Carvajal-Hernández ◽  
Laura Salazar ◽  
...  
Keyword(s):  
Species Richness ◽  
Functional Diversity ◽  
Environmental Conditions ◽  
Linear Models ◽  
Environmental Filtering ◽  
Diversity Indices ◽  
Resource Acquisition ◽  
Climate Data ◽  
Acquisition Strategies ◽  
Functional Diversity Indices

Functional traits determine how species interact with their abiotic and biotic environment. In turn, functional diversity describes how assemblages of species as a whole are adapted to their environment, which also determines how they might react to changing conditions. To fully understand functional diversity, it is fundamental to (a) disentangle the influences of environmental filtering and species richness from each other, (b) assess if the trait space saturates at high levels of species richness, and (c) understand how changes in species numbers affect the relative importance of the trait niche expansion and packing. In the present study, we determined functional diversity of fern assemblages by describing morphological traits related to resource acquisition along four tropical elevational transects with different environmental conditions and species richness. We used several functional diversity indices and their standardized effect size to consider different aspects of functional diversity. We contrasted these aspects of functional diversity with climate data and species richness using linear models and linear mixed models. Our results show that functional morphological trait diversity was primarily driven by species richness and only marginally by environmental conditions. Moreover, increasing species richness contributed progressively to packing of the morphological niche space, while at the same time decreasing morphological expansion until a saturation point was reached. Overall, our findings suggest that the density of co-occurring species is the fundamental driving force of morphological niche structure, and environmental conditions have only an indirect influence on fern resource acquisition strategies.

A guide for using functional diversity indices to reveal changes in assembly processes along ecological gradients

2012 ◽  
Vol 24 (5) ◽  
pp. 794-806 ◽  
Author(s):  
Norman W.H. Mason ◽  
Francesco de Bello ◽  
David Mouillot ◽  
Sandrine Pavoine ◽  
Stéphane Dray
Keyword(s):  
Functional Diversity ◽  
Diversity Indices ◽  
Ecological Gradients ◽  
Functional Diversity Indices

scholarly journals Effect of non-native species on taxonomic and functional diversity of fish communities in different river types

2021 ◽  
Author(s):  
Péter Takács ◽  
András Abonyi ◽  
Bálint Bánó ◽  
Tibor Erős
Keyword(s):  
Functional Diversity ◽  
Native Species ◽  
Habitat Type ◽  
Taxonomic Diversity ◽  
Diversity Indices ◽  
Species Number ◽  
River Types ◽  
Biogeographic Region ◽  
Native Fishes ◽  
Good Proxy

AbstractRecent researches suggest that functional diversity represents the response of communities to environmental alterations better than taxonomic diversity. However, there is scarce information about how the functional diversity of freshwater fishes is affected by habitat type and the dominance of non-native species. To address this question, we analysed a large database containing 15 morpho-functional traits of 61 fish species from the Pannon Biogeographic region (Hungary). Based on a fish faunistic list and relative abundance of taxa, we quantified the taxonomic and functional diversity of riverine communities for > 700 sites of six habitat types. We asked how non-native fishes affected the taxonomic and functional diversity in different river types and at the local scale (i.e. at the site level), and how the diversity measures of native fauna elements changes along the invasion gradient. Our results showed that both functional and taxonomic richness increases with habitat complexity, from small headwater streams to large rivers. Therefore taxonomic diversity served as a good proxy for functional diversity along the environmental gradient of river types. Non-natives showed considerable functional diversity relative to their species number in each habitat type. Diversity values of native fauna elements initially increased, and then showed a major decrease along the invasion gradient. River type-specific evaluations highlighted the importance of considering the proliferation of invasive species based on both taxonomic and functional diversity indices. We argue that type-specific action plans are needed in conservation management to preserve the taxonomic and functional diversity of native fishes in Hungary, but also elsewhere.

Sign in / Sign up

Export Citation Format

Share Document