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Article: Global distribution of a key trophic guild contrasts with common latitudinal diversity patterns

TitleGlobal distribution of a key trophic guild contrasts with common latitudinal diversity patterns
Authors
KeywordsGlobal distribution pattern
Latitudinal diversity gradient
Leaf litter quality
Shredder detritivores
Stream ecosystems
Issue Date2011
PublisherEcological Society of America. The Journal's web site is located at http://www.esajournals.org/loi/ecol
Citation
Ecology, 2011, v. 92 n. 9, p. 1839-1848 How to Cite?
AbstractMost hypotheses explaining the general gradient of higher diversity toward the equator are implicit or explicit about greater species packing in the tropics. However, global patterns of diversity within guilds, including trophic guilds (i.e., groups of organisms that use similar food resources), are poorly known. We explored global diversity patterns of a key trophic guild in stream ecosystems, the detritivore shredders. This was motivated by the fundamental ecological role of shredders as decomposers of leaf litter and by some records pointing to low shredder diversity and abundance in the tropics, which contrasts with diversity patterns of most major taxa for which broad-scale latitudinal patterns haven been examined. Given this evidence, we hypothesized that shredders are more abundant and diverse in temperate than in tropical streams, and that this pattern is related to the higher temperatures and lower availability of high-quality leaf litter in the tropics. Our comprehensive global survey (129 stream sites from 14 regions on six continents) corroborated the expectedlatitudinal pattern and showed that shredder distribution (abundance, diversity and assemblage composition) was explained by a combination of factors, including water temperature (some taxa were restricted to cool waters) and biogeography (some taxa were more diverse in particular biogeographic realms). In contrast to our hypothesis, shredder diversity was unrelated to leaf toughness, but it was inversely related to litter diversity. Our findings markedly contrast with global trends of diversity for most taxa, and with the general rule of higher consumer diversity at higher levels of resource diversity. Moreover, they highlight the emerging role of temperature in understanding global patterns of diversity, which is of great relevance in the face of projected global warming. © 2011 by the Ecological Society of America.
Persistent Identifierhttp://hdl.handle.net/10722/140926
ISSN
2015 Impact Factor: 4.733
2015 SCImago Journal Rankings: 3.995
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorBoyero, Len_HK
dc.contributor.authorPearson, RGen_HK
dc.contributor.authorDudgeon, Den_HK
dc.contributor.authorGraça, MASen_HK
dc.contributor.authorGessner, MOen_HK
dc.contributor.authorAlbariño, RJen_HK
dc.contributor.authorFerreira, Ven_HK
dc.contributor.authorYule, CMen_HK
dc.contributor.authorBoulton, AJen_HK
dc.contributor.authorArunachalam, Men_HK
dc.contributor.authorCallisto, Men_HK
dc.contributor.authorChauvet, Een_HK
dc.contributor.authorRamírez, Aen_HK
dc.contributor.authorChará, Jen_HK
dc.contributor.authorMoretti, MSen_HK
dc.contributor.authorGonçalves Jr, JFen_HK
dc.contributor.authorHelson, JEen_HK
dc.contributor.authorCharáSerna, AMen_HK
dc.contributor.authorEncalada, ACen_HK
dc.contributor.authorDavies, JNen_HK
dc.contributor.authorLamothe, Sen_HK
dc.contributor.authorCornejo, Aen_HK
dc.contributor.authorLi, AOYen_HK
dc.contributor.authorBuria, LMen_HK
dc.contributor.authorVillanueva, VDen_HK
dc.contributor.authorZúñiga, MCen_HK
dc.contributor.authorPringle, CMen_HK
dc.date.accessioned2011-09-23T06:21:30Z-
dc.date.available2011-09-23T06:21:30Z-
dc.date.issued2011en_HK
dc.identifier.citationEcology, 2011, v. 92 n. 9, p. 1839-1848en_HK
dc.identifier.issn0012-9658en_HK
dc.identifier.urihttp://hdl.handle.net/10722/140926-
dc.description.abstractMost hypotheses explaining the general gradient of higher diversity toward the equator are implicit or explicit about greater species packing in the tropics. However, global patterns of diversity within guilds, including trophic guilds (i.e., groups of organisms that use similar food resources), are poorly known. We explored global diversity patterns of a key trophic guild in stream ecosystems, the detritivore shredders. This was motivated by the fundamental ecological role of shredders as decomposers of leaf litter and by some records pointing to low shredder diversity and abundance in the tropics, which contrasts with diversity patterns of most major taxa for which broad-scale latitudinal patterns haven been examined. Given this evidence, we hypothesized that shredders are more abundant and diverse in temperate than in tropical streams, and that this pattern is related to the higher temperatures and lower availability of high-quality leaf litter in the tropics. Our comprehensive global survey (129 stream sites from 14 regions on six continents) corroborated the expectedlatitudinal pattern and showed that shredder distribution (abundance, diversity and assemblage composition) was explained by a combination of factors, including water temperature (some taxa were restricted to cool waters) and biogeography (some taxa were more diverse in particular biogeographic realms). In contrast to our hypothesis, shredder diversity was unrelated to leaf toughness, but it was inversely related to litter diversity. Our findings markedly contrast with global trends of diversity for most taxa, and with the general rule of higher consumer diversity at higher levels of resource diversity. Moreover, they highlight the emerging role of temperature in understanding global patterns of diversity, which is of great relevance in the face of projected global warming. © 2011 by the Ecological Society of America.en_HK
dc.languageengen_US
dc.publisherEcological Society of America. The Journal's web site is located at http://www.esajournals.org/loi/ecolen_HK
dc.relation.ispartofEcologyen_HK
dc.rightsEcology. Copyright © Ecological Society of America.-
dc.rightsCopyright by the Ecological Society of America, along with the full citation-
dc.subjectGlobal distribution patternen_HK
dc.subjectLatitudinal diversity gradienten_HK
dc.subjectLeaf litter qualityen_HK
dc.subjectShredder detritivoresen_HK
dc.subjectStream ecosystemsen_HK
dc.subject.meshBiodiversity-
dc.subject.meshDemography-
dc.subject.meshFeeding Behavior-
dc.subject.meshFood Chain-
dc.subject.meshInvertebrates - physiology-
dc.titleGlobal distribution of a key trophic guild contrasts with common latitudinal diversity patternsen_HK
dc.typeArticleen_HK
dc.identifier.emailDudgeon, D: ddudgeon@hku.hken_HK
dc.identifier.authorityDudgeon, D=rp00691en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1890/10-2244.1en_HK
dc.identifier.pmid21939080-
dc.identifier.scopuseid_2-s2.0-80051912055en_HK
dc.identifier.hkuros194878en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80051912055&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume92en_HK
dc.identifier.issue9en_HK
dc.identifier.spage1839en_HK
dc.identifier.epage1848en_HK
dc.identifier.isiWOS:000294152800015-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridBoyero, L=6602083170en_HK
dc.identifier.scopusauthoridPearson, RG=7401904911en_HK
dc.identifier.scopusauthoridDudgeon, D=7006559840en_HK
dc.identifier.scopusauthoridGraça, MAS=7005609094en_HK
dc.identifier.scopusauthoridGessner, MO=26534107100en_HK
dc.identifier.scopusauthoridAlbariño, RJ=6602175928en_HK
dc.identifier.scopusauthoridFerreira, V=8564663900en_HK
dc.identifier.scopusauthoridYule, CM=6603049087en_HK
dc.identifier.scopusauthoridBoulton, AJ=35267971600en_HK
dc.identifier.scopusauthoridArunachalam, M=8851791400en_HK
dc.identifier.scopusauthoridCallisto, M=6602888024en_HK
dc.identifier.scopusauthoridChauvet, E=7004042542en_HK
dc.identifier.scopusauthoridRamírez, A=7401735232en_HK
dc.identifier.scopusauthoridChará, J=6506295303en_HK
dc.identifier.scopusauthoridMoretti, MS=16643472000en_HK
dc.identifier.scopusauthoridGonçalves Jr, JF=13806594800en_HK
dc.identifier.scopusauthoridHelson, JE=12239552200en_HK
dc.identifier.scopusauthoridCharáSerna, AM=36439163200en_HK
dc.identifier.scopusauthoridEncalada, AC=6507051570en_HK
dc.identifier.scopusauthoridDavies, JN=28067773400en_HK
dc.identifier.scopusauthoridLamothe, S=37014629200en_HK
dc.identifier.scopusauthoridCornejo, A=35104671800en_HK
dc.identifier.scopusauthoridLi, AOY=24773824300en_HK
dc.identifier.scopusauthoridBuria, LM=22133355500en_HK
dc.identifier.scopusauthoridVillanueva, VD=7004695653en_HK
dc.identifier.scopusauthoridZúñiga, MC=55391058500en_HK
dc.identifier.scopusauthoridPringle, CM=7004950358en_HK

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