Core and occasional species: A new way forward

Helden, Alvin J.

doi:10.1002/ece3.7863

Cited by 3 publications

(1 citation statement)

References 53 publications

(157 reference statements)

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“…Finally, determining how geographic rarity contributes to spatial patterns of taxonomic diversity measures such as Simpson's index or species evenness will depend on the relationship between geographic rarity and species abundance. Using sequential approaches in this context have recently been used to identify core and satellite (occasional) species (Helden, 2021). Applying this within a spatial context could help predict changes in biodiversity patterns following biodiversity loss.…”

Section: Roadmap For Future Research Into the Contribution Of Commonn...mentioning

confidence: 99%

The contribution of geographically common and rare species to the spatial distribution of biodiversity

White

McKeon

Pakeman

et al. 2023

Global Ecol Biogeogr

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Motivation and aimMapping the spatial distribution of biodiversity is critical for understanding its fundamental drivers (e.g. speciation, environmental filtering) as well as for conservation assessment. An important dimension of this topic is how the distributions of subsets of species contribute to the overall distribution of biodiversity. Although studies have previously investigated the role of geographically common and rare species in determining these patterns, their respective contributions appear to vary between studies. Knowing which species contribute disproportionately to the spatial distribution of biodiversity enables the identification of key indicator species for biodiversity assessments across large areas and is important for prioritising areas for conservation actions. An extensive review of the literature was carried out to synthesise research on how geographic rarity contributes to spatial patterns of biodiversity. We identify potential explanations for the discrepancies in findings between studies and identify opportunities for further research.ResultsMany studies on the contribution of geographic commonness and rarity to the spatial distribution of biodiversity focus on species richness. A prevalent view is that common (widespread) species contribute disproportionately, although this is not ubiquitous across studies due to factors such as the geographic extent from which relative rarity is quantified. We identify research pathways that will further improve our knowledge of how geographically common and rare species shape the spatial distribution of biodiversity including the impact of spatial scale on species contributions and the incorporation of biodiversity components beyond taxonomic alpha diversity, that is functional and phylogenetic diversity.Main conclusionsFuture research should incorporate multiple biodiversity components and model scale dependency. This will further our knowledge on the underlying processes that shape the spatial variation of biodiversity across the planet and help inform biological surveys and conservation activities.

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Section: Roadmap For Future Research Into the Contribution Of Commonn...mentioning

confidence: 99%

The contribution of geographically common and rare species to the spatial distribution of biodiversity

White

McKeon

Pakeman

et al. 2023

Global Ecol Biogeogr

View full text Add to dashboard Cite

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Natural or anthropogenic variability? A long-term pattern of the zooplankton communities in an ever-changing transitional ecosystem

et al. 2023

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The Venice Lagoon is an important site belonging to the Italian Long-Term Ecological Research Network (LTER). Alongside with the increasing trend of water temperature and the relevant morphological changes, in recent years, the resident zooplankton populations have also continued to cope with the colonization by alien species, particularly the strong competitor Mnemiopsis leidyi. In this work, we compared the dynamics of the lagoon zooplankton over a period of 20 years. The physical and biological signals are analyzed and compared to evaluate the hypothesis that a slow shift in the environmental balance of the site, such as temperature increase, sea level rise (hereafter called “marinization”), and competition between species, is contributing to trigger a drift in the internal equilibrium of the resident core zooplankton. Though the copepod community does not seem to have changed its state, some important modifications of structure and assembly mechanisms have already been observed. The extension of the marine influence within the lagoon has compressed the spatial gradients of the habitat and created a greater segregation of the niches available to some typically estuarine taxa and broadened and strengthened the interactions between marine species.

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Strong Decline in Breeding-Bird Community Abundance Throughout Habitats in the Azov Region (Southeastern Ukraine) Linked to Land-Use Intensification and Climate

et al. 2022

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In recent decades, bird communities associated with agricultural systems have declined in Western and Central Europe and in North America, but how widely these dynamics extend to other regions is poorly known. In this study, we assessed the dynamics and the main drivers of the changes in the abundance, richness, and composition of breeding bird communities over a 30-year period in the various types of habitats of southeastern Ukraine (Azov region), a region that has undergone agricultural intensification for several decades. This study was conducted in the valley of the Molochna River during the 1988 to 2018 nesting seasons. The area studied hosted 81 bird species. Species richness varied from three species in salt marshes to thirty-three in reed beds but did not show a general trend over time. However, we identified a decline in bird communities’ total abundance over time in all habitats except shelterbelts and meadows. Similarly, species composition changed over time, reflecting the way in which species varied in their abundance changes. Climatic variables contributed to bird community turnover, but with decreasing importance over time. Overall, our results indicate that the recent declines in bird populations in farmland regions also extend to eastern Europe, with land-use effects interacting with climate to shape temporal dynamics of bird communities.

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Core and occasional species: A new way forward

Cited by 3 publications

References 53 publications

The contribution of geographically common and rare species to the spatial distribution of biodiversity

The contribution of geographically common and rare species to the spatial distribution of biodiversity

Natural or anthropogenic variability? A long-term pattern of the zooplankton communities in an ever-changing transitional ecosystem

Strong Decline in Breeding-Bird Community Abundance Throughout Habitats in the Azov Region (Southeastern Ukraine) Linked to Land-Use Intensification and Climate

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