The Dual Nature of Community Variability

Micheli, Fiorenza; Cottingham, Kathryn L.; Bascompte, Jordi; Bjørnstad, Ottar N.; Eckert, Ginny L.; Fischer, Janet M.; Keitt, Timothy H.; Kendall, Bruce E.; Klug, Jennifer L.; Rusak, James A.

doi:10.2307/3546802

Cited by 173 publications

(221 citation statements)

References 57 publications

Supporting

Mentioning

209

Contrasting

Unclassified

Order By: Relevance

“…Although high tolerance among some crustaceans is predicted because of their internal acid-base regulation and low degree of calcification (10,21), a compensatory increase in the abundance of some amphipods and tanaids could be caused by competitive release or decreased predation rates (22). Although the exact prey of many of the carnivores studied here is unknown, it is possible that some of the carnivorous polychaetes that suffered reductions in abundance in low and extreme low pH zones prey Values are means (± SD).…”

Section: Discussionmentioning

confidence: 99%

Divergent ecosystem responses within a benthic marine community to ocean acidification

Kroeker

Micheli

Gambi

et al. 2011

Proc. Natl. Acad. Sci. U.S.A.

300

364

View full text Add to dashboard Cite

Ocean acidification is predicted to impact all areas of the oceans and affect a diversity of marine organisms. However, the diversity of responses among species prevents clear predictions about the impact of acidification at the ecosystem level. Here, we used shallow water CO 2 vents in the Mediterranean Sea as a model system to examine emergent ecosystem responses to ocean acidification in rocky reef communities. We assessed in situ benthic invertebrate communities in three distinct pH zones (ambient, low, and extreme low), which differed in both the mean and variability of seawater pH along a continuous gradient. We found fewer taxa, reduced taxonomic evenness, and lower biomass in the extreme low pH zones. However, the number of individuals did not differ among pH zones, suggesting that there is density compensation through population blooms of small acidificationtolerant taxa. Furthermore, the trophic structure of the invertebrate community shifted to fewer trophic groups and dominance by generalists in extreme low pH, suggesting that there may be a simplification of food webs with ocean acidification. Despite high variation in individual species' responses, our findings indicate that ocean acidification decreases the diversity, biomass, and trophic complexity of benthic marine communities. These results suggest that a loss of biodiversity and ecosystem function is expected under extreme acidification scenarios.global change | natural gradient | emergent effects

show abstract

Section: Discussionmentioning

confidence: 99%

Divergent ecosystem responses within a benthic marine community to ocean acidification

Kroeker

Micheli

Gambi

et al. 2011

Proc. Natl. Acad. Sci. U.S.A.

300

364

View full text Add to dashboard Cite

show abstract

“…Las comunidades no son estáticas, pues poseen variaciones temporales en su composición específi-ca, en las abundancias de las especies que las componen y en las densidades relativas entre ellas (Micheli et al 1999). Estos cambios pueden afectar la estabilidad y la predecibilidad de las relaciones interespecíficas, y la influencia será mayor cuanto más variables sean las comunidades en escalas de tiempo relativamente cortas (Mac Nally 1995).…”

Section: Introductionunclassified

Diet switching of seed-eating birds wintering in grazed habitats of the central Monte Desert, Argentina

et al. 2017

View full text Add to dashboard Cite

“…Sin embargo, el estudio de la variabilidad espacial y temporal de la composición y de las propiedades agregadas de las comunidades biológicas (e.g., diversidad, riqueza de especies, dominancia, etc., sensu Micheli et al 1999) constituye uno de los temas centrales de la ecología de comunidades (Jaksic & Marone 2007). En consecuencia, en la mayoría de los estudios de las infracomunidades de parásitos solo es posible efectuar aproximaciones estadísticas no manipulativas, adecuadamente replicadas en el tiempo y en el espacio.…”

Section: Introductionunclassified

Variabilidad de las comunidades de parásitos metazoos del róbalo Eleginops maclovinus (Cuvier & Valenciennes, 1830) (Pisces: Eleginopidae) en Chile

George-Nascimento¹,

Mellado²,

Saavedra³

et al. 2009

Rev. chil. hist. nat.

View full text Add to dashboard Cite

The Dual Nature of Community Variability

Cited by 173 publications

References 57 publications

Divergent ecosystem responses within a benthic marine community to ocean acidification

Divergent ecosystem responses within a benthic marine community to ocean acidification

Diet switching of seed-eating birds wintering in grazed habitats of the central Monte Desert, Argentina

Variabilidad de las comunidades de parásitos metazoos del róbalo Eleginops maclovinus (Cuvier & Valenciennes, 1830) (Pisces: Eleginopidae) en Chile

Contact Info

Product

Resources

About