TY  - JOUR
AU  - Srivastava, D.S.
AU  - Céréghino, R.
AU  - Trzcinski, M.K.
AU  - MacDonald, A.A.M.
AU  - Marino, N.A.C.
AU  - Mercado, D.A.
AU  - Leroy, C.
AU  - Corbara, B.
AU  - Romero, G.Q.
AU  - Farjalla, V.F.
AU  - Barberis, I.M.
AU  - Dézerald, O.
AU  - Hammill, E.
AU  - Atwood, T.B.
AU  - Piccoli, G.C.O.
AU  - Ospina-Bautista, F.
AU  - Carrias, J.-F.
AU  - Leal, J.S.
AU  - Montero, G.
AU  - Antiqueira, P.A.P.
AU  - Freire, R.
AU  - Realpe, E.
AU  - Amundrud, S.L.
AU  - de Omena, P.M.
AU  - Campos, A.B.A.
PY  - 2020//
TI  - Ecological response to altered rainfall differs across the Neotropics
T2  - Ecology
JO  - Ecology
SP  - e02984
VL  - 101
IS  - 4
PB  - Ecological Society of America
KW  - contingency
KW  - distributed experiment
KW  - freshwater
KW  - global change biology
KW  - macroinvertebrates
KW  - phytotelmata
KW  - precipitation
KW  - aquatic ecosystem
KW  - climate change
KW  - climate conditions
KW  - ecosystem response
KW  - extreme event
KW  - functional group
KW  - invertebrate
KW  - Neotropical Region
KW  - rainfall
KW  - species pool
KW  - Bacteria (microorganisms)
KW  - Invertebrata
KW  - rain
KW  - animal
KW  - drought
KW  - ecosystem
KW  - Animals
KW  - Droughts
KW  - Invertebrates
N2  - There is growing recognition that ecosystems may be more impacted by infrequent extreme climatic events than by changes in mean climatic conditions. This has led to calls for experiments that explore the sensitivity of ecosystems over broad ranges of climatic parameter space. However, because such response surface experiments have so far been limited in geographic and biological scope, it is not clear if differences between studies reflect geographic location or the ecosystem component considered. In this study, we manipulated rainfall entering tank bromeliads in seven sites across the Neotropics, and characterized the response of the aquatic ecosystem in terms of invertebrate functional composition, biological stocks (total invertebrate biomass, bacterial density) and ecosystem fluxes (decomposition, carbon, nitrogen). Of these response types, invertebrate functional composition was the most sensitive, even though, in some sites, the species pool had a high proportion of drought-tolerant families. Total invertebrate biomass was universally insensitive to rainfall change because of statistical averaging of divergent responses between functional groups. The response of invertebrate functional composition to rain differed between geographical locations because (1) the effect of rainfall on bromeliad hydrology differed between sites, and invertebrates directly experience hydrology not rainfall and (2) the taxonomic composition of some functional groups differed between sites, and families differed in their response to bromeliad hydrology. These findings suggest that it will be difficult to establish thresholds of “safe ecosystem functioning” when ecosystem components differ in their sensitivity to climatic variables, and such thresholds may not be broadly applicable over geographic space. In particular, ecological forecast horizons for climate change may be spatially restricted in systems where habitat properties mediate climatic impacts, and those, like the tropics, with high spatial turnover in species composition. © 2020 by the Ecological Society of America
SN  - 00129658 (Issn)
UR  - http://dx.doi.org/10.1002/ecy.2984
N1  - exported from refbase (http://php.ecofog.gf/refbase/show.php?record=979), last updated on Mon, 08 Feb 2021 14:18:46 -0300
ID  - Srivastava_etal2020
ER  -