e-journal

Running to stand still: temperature eVects on species richness, species turnover, and functional community dynamics

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Abstract

The information on temperature-mediated changes in biodiversity in local assemblages is scarce and mainly addresses the change in species richness. However, warming may have more consistent eVects on species turnover than on the number of species. Moreover, very few studies extended the analysis of changes in biodiversity and species composition to questions of associated ecosystem functions such as primary production. Here, we synthesize 4 case studies employing microalgal microcosms within the Aquashift priority program to ask (1) do warming-related
shifts in species richness correspond to changes in the rate
of biomass production, (2) do similar relationships prevail
for evenness, and (3) do warming-related shifts in species
turnover stabilize or destabilize biomass production? Two
of the four cases are previously unpublished, and for a third
case, the link between diversity and functional consequences
of temperature was not analyzed before. We found accelerated loss of species with warming in all cases. Biomass production was lower with lower species richness in most cases but increased with lower evenness. Most importantly, the relation between functional and compositional stability was diVerent between cases: More rapid extinction resulted in more variable biomass in 2 cases conducted with a limited species pool, indicating that compositional destabilization relates to functional variability. By contrast, the only experiment with a large species pool (30 species) allowed previously rare species to become dominant in the community and showed more stable biomass at high turnover, indicating that compensatory dynamics (turnover) can promote functional stability. These 4 independent experiments highlight the need to consider both compositional
and functional consequences of altered temperature regimes.

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Ketersediaan

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Informasi Detail

Judul Seri

Marine Biology (2012) 159:2415–2422

No. Panggil

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Penerbit

: Springer-Verlag., 2012

Deskripsi Fisik

Marine Biology (2012) 159:2415–2422

Bahasa

English

ISBN/ISSN

1432-1793

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

ILMU LINGKUNGAN

Info Detail Spesifik

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Pernyataan Tanggungjawab

Ety

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