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Statements

Subject Item
n2:RIV%2F60076658%3A12310%2F12%3A43883627%21RIV13-MSM-12310___
rdf:type
n16:Vysledek skos:Concept
dcterms:description
Classical niche theory explains the coexistence of species through their exploitation of different resources. Assemblages of herbivores coexisting on a particular plant species are thus expected to be dominated by species from host-specific guilds with narrow, coexistence-facilitating niches rather than by species from generalist guilds. Exactly the opposite pattern is observed for folivores feeding on trees in New Guinea. The least specialized mobile chewers were the most species rich, followed by the moderately specialized semiconcealed and exposed chewers. The highly specialized miners and mesophyll suckers were the least species-rich guilds. The Poisson distribution of herbivore species richness among plant species in specialized guilds and the absence of a negative correlation between species richness in different guilds on the same plant species suggest that these guilds are not saturated with species. We show that herbivore assemblages are enriched with generalists because these are more completely sampled from regional species pools. Herbivore diversity increases as a power function of plant diversity, and the rate of increase is inversely related to host specificity. The relative species diversity among guilds is thus scale dependent, as the importance of specialized guilds increases with plant diversity. Specialized insect guilds may therefore comprise a larger component of overall diversity in the tropics (where they are also poorly known taxonomically) than in the temperate zone, which has lower plant diversity. Classical niche theory explains the coexistence of species through their exploitation of different resources. Assemblages of herbivores coexisting on a particular plant species are thus expected to be dominated by species from host-specific guilds with narrow, coexistence-facilitating niches rather than by species from generalist guilds. Exactly the opposite pattern is observed for folivores feeding on trees in New Guinea. The least specialized mobile chewers were the most species rich, followed by the moderately specialized semiconcealed and exposed chewers. The highly specialized miners and mesophyll suckers were the least species-rich guilds. The Poisson distribution of herbivore species richness among plant species in specialized guilds and the absence of a negative correlation between species richness in different guilds on the same plant species suggest that these guilds are not saturated with species. We show that herbivore assemblages are enriched with generalists because these are more completely sampled from regional species pools. Herbivore diversity increases as a power function of plant diversity, and the rate of increase is inversely related to host specificity. The relative species diversity among guilds is thus scale dependent, as the importance of specialized guilds increases with plant diversity. Specialized insect guilds may therefore comprise a larger component of overall diversity in the tropics (where they are also poorly known taxonomically) than in the temperate zone, which has lower plant diversity.
dcterms:title
Insects on Plants: Explaining the Paradox of Low Diversity within Specialist Herbivore Guilds Insects on Plants: Explaining the Paradox of Low Diversity within Specialist Herbivore Guilds
skos:prefLabel
Insects on Plants: Explaining the Paradox of Low Diversity within Specialist Herbivore Guilds Insects on Plants: Explaining the Paradox of Low Diversity within Specialist Herbivore Guilds
skos:notation
RIV/60076658:12310/12:43883627!RIV13-MSM-12310___
n16:predkladatel
n17:orjk%3A12310
n3:aktivita
n10:P n10:Z
n3:aktivity
P(GA206/09/0115), P(GAP505/10/0673), P(GD206/08/H044), P(IAA600960712), P(LC06073), P(LH11008), P(ME09082), Z(AV0Z50070508), Z(MSM6007665801)
n3:cisloPeriodika
3
n3:dodaniDat
n18:2013
n3:domaciTvurceVysledku
n12:4876954 n12:6057624
n3:druhVysledku
n8:J
n3:duvernostUdaju
n7:S
n3:entitaPredkladatele
n15:predkladatel
n3:idSjednocenehoVysledku
142001
n3:idVysledku
RIV/60076658:12310/12:43883627
n3:jazykVysledku
n13:eng
n3:klicovaSlova
niche theory; host specialization; New Guinea; rainforest; SPECIATION; SPECIFICITY; LEPIDOPTERA; BODY-SIZE; PHYTOPHAGOUS INSECTS; ECOLOGICAL COMMUNITIES; TROPICAL FORESTS; SPECIES RICHNESS; HOST SPECIALIZATION; GUINEA RAIN-FOREST
n3:klicoveSlovo
n6:SPECIES%20RICHNESS n6:rainforest n6:TROPICAL%20FORESTS n6:ECOLOGICAL%20COMMUNITIES n6:SPECIFICITY n6:New%20Guinea n6:niche%20theory n6:GUINEA%20RAIN-FOREST n6:BODY-SIZE n6:SPECIATION n6:host%20specialization n6:LEPIDOPTERA n6:HOST%20SPECIALIZATION n6:PHYTOPHAGOUS%20INSECTS
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[1929887BB2A5]
n3:nazevZdroje
American Naturalist
n3:obor
n14:EH
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
8
n3:projekt
n4:GA206%2F09%2F0115 n4:LH11008 n4:LC06073 n4:ME09082 n4:GD206%2F08%2FH044 n4:GAP505%2F10%2F0673 n4:IAA600960712
n3:rokUplatneniVysledku
n18:2012
n3:svazekPeriodika
179
n3:tvurceVysledku
Basset, Yves Weiblen, George D. Miller, Scott E. Novotný, Vojtěch Hrček, Jan Baje, Leontine Stewart, Alan J. A. Lewis, Owen T.
n3:wos
000300454400006
n3:zamer
n20:MSM6007665801 n20:AV0Z50070508
s:issn
0003-0147
s:numberOfPages
12
n21:doi
10.1086/664082
n19:organizacniJednotka
12310