Distribution of specialist and generalist species along spatial gradients of habitat disturbance and fragmentation

Devictor, Vincent; Julliard, Romain; Jiguet, Frédéric

doi:10.1111/j.2008.0030-1299.16215.x

Cited by 282 publications

(402 citation statements)

References 58 publications

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“…On the contrary, fungivorous species, which are more specialized in food, were associated with the undisturbed beech forest. A similar specializationdisturbance trend was observed for other animal groups (Devictor et al 2008;Webb & Shine 1998) as well as for soil microarthropods (Blasi et al 2012;Schon et al 2008).…”

Section: Density and Diversitysupporting

confidence: 80%

Spruce monoculture establishment affects functional traits of soil microarthropod communities

2013

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Structure and density of soil microarthropod communities (Oribatida and Collembola) were studied in one natural beech forest and one spruce monoculture planted on a former beech stand in South Bohemia (Czech Republic in the spruce monoculture for Collembola); additionally, it changed greatly the community structure in terms of species composition and functional traits. In the spruce monoculture, groups susceptible to disturbance were suppressed. The oribatid trophic structure changed as well with opportunistic herbifungivorous species increasing in the monoculture at the expense of fungivorous species. Similarly, hemiedaphic collembolans increased in the monoculture at the expense of euedaphic species. We conclude that the "functional approach" seems to be fruitful in revealing soil fauna response to environmental change.

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Section: Density and Diversitysupporting

confidence: 80%

Spruce monoculture establishment affects functional traits of soil microarthropod communities

2013

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“…Agroecosystems can lead to environmental alterations that limit the occurrence of species that have functional traits incompatible with local conditions (Devictor et al 2008). According to the niche-filtering hypothesis, coexisting species are functionally more similar to one another than would be expected by chance (redundancy) because environmental conditions act as a filter, allowing only species with traits compatible with local conditions to survive (Zobel 1997).…”

Section: Introductionmentioning

confidence: 99%

More of the Same: High Functional Redundancy in Stream Fish Assemblages from Tropical Agroecosystems

Casatti

Teresa

Zeni

et al. 2015

Environmental Management

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In this study, we investigated the influence of environmental variables (predictor variables) on the species richness, species diversity, functional diversity, and functional redundancy (response variables) of stream fish assemblages in an agroecosystem that harbor a gradient of degradation. We hypothesized that, despite presenting high richness or diversity in some occasions, fish communities will be more functionally redundant with stream degradation. Species richness, species diversity, and functional redundancy were predicted by the percentage of grass on the banks, which is a characteristic that indicates degraded conditions, whereas the percentage of coarse substrate in the stream bottom was an important predictor of all response variables and indicates more preserved conditions. Despite being more numerous and diverse, the groups of species living in streams with an abundance of grass on the banks perform similar functions in the ecosystem. We found that riparian and watershed land use had low predictive power in comparison to the instream habitat. If there is any interest in promoting ecosystem functions and fish diversity, conservation strategies should seek to restore forests in watersheds and riparian buffers, protect instream habitats from siltation, provide wood debris, and mitigate the proliferation of grass on stream banks. Such actions will work better if they are planned together with good farming practices because these basins will continue to be used for agriculture and livestock in the future.

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“…butterflies (Haddad 1999;Brückmann et al 2010;Dennis et al 2013) and plants (Brückmann et al 2010) Generalist Heterogeneity Less sensitive to quality (Ye et al 2013) e.g. birds (Devictor et al 2008), butterflies (Oliver et al 2010) More sites Occur in matrix, occupy smaller isolated patches (Dennis et al 2013) Habitat requirements…”

Section: Biggermentioning

confidence: 99%

“…Specialist species are often more threatened than generalist species, more sensitive to within-patch variation in quality, and thus benefit from more homogeneous environments (Devictor et al 2008;Ye et al 2013). Nevertheless, if specialist species also have small geographic ranges and restricted populations, they are more vulnerable to environmental change (e.g.…”

Section: Homogeneity or Heterogeneity?mentioning

confidence: 99%

Old concepts, new challenges: adapting landscape-scale conservation to the twenty-first century

2016

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Landscape-scale approaches to conservation stem largely from the classic ideas of reserve design: encouraging bigger and more sites, enhancing connectivity among sites, and improving habitat quality. Trade-offs are imposed between these four strategies by the limited resources and opportunities available for conservation programmes, including the establishment and management of protected areas, and wildlife-friendly farming and forestry. Although debate regarding trade-offs between the size, number, connectivity and quality of protected areas was prevalent in the 1970-1990s, the implications of the same trade-offs for ongoing conservation responses to threats from accelerating environmental change have rarely been addressed. Here, we reassess the implications of reserve design theory for landscape-scale conservation, and present a blueprint to help practitioners to prioritise among the four strategies. We consider the new perspectives placed on landscape-scale conservation programmes by twenty-first century pressures including climate change, invasive species and the need to marry food security with biodiversity conservation. A framework of the situations under which available theory and evidence recommend that each of the four strategies be prioritized is provided, seeking to increase the clarity required for urgent conservation decision-making.

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Distribution of specialist and generalist species along spatial gradients of habitat disturbance and fragmentation

Cited by 282 publications

References 58 publications

Spruce monoculture establishment affects functional traits of soil microarthropod communities

Spruce monoculture establishment affects functional traits of soil microarthropod communities

More of the Same: High Functional Redundancy in Stream Fish Assemblages from Tropical Agroecosystems

Old concepts, new challenges: adapting landscape-scale conservation to the twenty-first century

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