Consumer vs environmental productivity control of bacterial diversity and bacteria-mediated organic matter decomposition

Lin Jiang, Jennifer Krumins

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We experimentally investigated the determinants (consumer vs environmental productivity) and functional consequences of bacterial diversity using a simple laboratory bacterial assemblage and the bacterivorous ciliated protist Colpidium striatum. A two-way factorial design was used, with two productivity levels crossed with the presence/absence of Colpidium striatum. The effects of productivity and predation on bacterial diversity were similar to those previously reported for plant diversity in systems characterized by high productivities, with increased productivity reducing diversity and predation increasing diversity. When Colpidium was present, changes in trophic level biomass and individual bacterial species abundance in response to increased productivity were largely consistent with the keystone predation model. Importantly, Colpidium predation also resulted in an increase in particulate organic matter decomposition, largely due to an increase in the abundance of one single bacterial species that appeared resistant to predation. These results suggest that changes in community structure as a result of trophic interactions and other factors may have profound consequences for important ecosystem functions. We suggest that future research should take an integrative approach and study causes and consequences of biodiversity simultaneously.

Original languageEnglish
Pages (from-to)441-450
Number of pages10
JournalOikos
Volume114
Issue number3
DOIs
StatePublished - 1 Sep 2006

Fingerprint

organic matter
predation
decomposition
productivity
bacterium
degradation
bacteria
trophic interaction
protist
particulate organic matter
ecosystem function
community structure
trophic level
biodiversity
ecosystems
biomass

Cite this

@article{18d079ba8ee44299bb47c9aa545158fd,
title = "Consumer vs environmental productivity control of bacterial diversity and bacteria-mediated organic matter decomposition",
abstract = "We experimentally investigated the determinants (consumer vs environmental productivity) and functional consequences of bacterial diversity using a simple laboratory bacterial assemblage and the bacterivorous ciliated protist Colpidium striatum. A two-way factorial design was used, with two productivity levels crossed with the presence/absence of Colpidium striatum. The effects of productivity and predation on bacterial diversity were similar to those previously reported for plant diversity in systems characterized by high productivities, with increased productivity reducing diversity and predation increasing diversity. When Colpidium was present, changes in trophic level biomass and individual bacterial species abundance in response to increased productivity were largely consistent with the keystone predation model. Importantly, Colpidium predation also resulted in an increase in particulate organic matter decomposition, largely due to an increase in the abundance of one single bacterial species that appeared resistant to predation. These results suggest that changes in community structure as a result of trophic interactions and other factors may have profound consequences for important ecosystem functions. We suggest that future research should take an integrative approach and study causes and consequences of biodiversity simultaneously.",
author = "Lin Jiang and Jennifer Krumins",
year = "2006",
month = "9",
day = "1",
doi = "10.1111/j.2006.0030-1299.14961.x",
language = "English",
volume = "114",
pages = "441--450",
journal = "Oikos",
issn = "0030-1299",
publisher = "Wiley-Blackwell Publishing Ltd",
number = "3",

}

Consumer vs environmental productivity control of bacterial diversity and bacteria-mediated organic matter decomposition. / Jiang, Lin; Krumins, Jennifer.

In: Oikos, Vol. 114, No. 3, 01.09.2006, p. 441-450.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Consumer vs environmental productivity control of bacterial diversity and bacteria-mediated organic matter decomposition

AU - Jiang, Lin

AU - Krumins, Jennifer

PY - 2006/9/1

Y1 - 2006/9/1

N2 - We experimentally investigated the determinants (consumer vs environmental productivity) and functional consequences of bacterial diversity using a simple laboratory bacterial assemblage and the bacterivorous ciliated protist Colpidium striatum. A two-way factorial design was used, with two productivity levels crossed with the presence/absence of Colpidium striatum. The effects of productivity and predation on bacterial diversity were similar to those previously reported for plant diversity in systems characterized by high productivities, with increased productivity reducing diversity and predation increasing diversity. When Colpidium was present, changes in trophic level biomass and individual bacterial species abundance in response to increased productivity were largely consistent with the keystone predation model. Importantly, Colpidium predation also resulted in an increase in particulate organic matter decomposition, largely due to an increase in the abundance of one single bacterial species that appeared resistant to predation. These results suggest that changes in community structure as a result of trophic interactions and other factors may have profound consequences for important ecosystem functions. We suggest that future research should take an integrative approach and study causes and consequences of biodiversity simultaneously.

AB - We experimentally investigated the determinants (consumer vs environmental productivity) and functional consequences of bacterial diversity using a simple laboratory bacterial assemblage and the bacterivorous ciliated protist Colpidium striatum. A two-way factorial design was used, with two productivity levels crossed with the presence/absence of Colpidium striatum. The effects of productivity and predation on bacterial diversity were similar to those previously reported for plant diversity in systems characterized by high productivities, with increased productivity reducing diversity and predation increasing diversity. When Colpidium was present, changes in trophic level biomass and individual bacterial species abundance in response to increased productivity were largely consistent with the keystone predation model. Importantly, Colpidium predation also resulted in an increase in particulate organic matter decomposition, largely due to an increase in the abundance of one single bacterial species that appeared resistant to predation. These results suggest that changes in community structure as a result of trophic interactions and other factors may have profound consequences for important ecosystem functions. We suggest that future research should take an integrative approach and study causes and consequences of biodiversity simultaneously.

UR - http://www.scopus.com/inward/record.url?scp=33845657469&partnerID=8YFLogxK

U2 - 10.1111/j.2006.0030-1299.14961.x

DO - 10.1111/j.2006.0030-1299.14961.x

M3 - Article

AN - SCOPUS:33845657469

VL - 114

SP - 441

EP - 450

JO - Oikos

JF - Oikos

SN - 0030-1299

IS - 3

ER -