Community assembly: when should history matter?

Chase, Jonathan M.

doi:10.1007/s00442-003-1311-7

Cited by 926 publications

(1,134 citation statements)

References 68 publications

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“…The most likely mechanism behind the external control is cell transport rate, implying that the local community structure to a large extent is controlled by regional processes, i.e., dispersal rates (Chase 2003). On the basis of these results, we propose that the external control leads to a large number of lakes that function as flow through systems rather than as microcosms (Forbes 1887) with respect to bacterial communities, i.e., that cells and growth media are continuously provided from drainage areas to lakes and thereby influence the composition of the bacterial communities.…”

Section: Materials and Methods-study Sites And Samplingmentioning

confidence: 99%

“…During the last decade, our knowledge about the diversity of bacteria in nature has increased enormously; however, little is understood about which factors are shaping bacterial communities (DeLong and Pace 2001;Zwart et al 2002). Central to understanding patterns in community structure is knowledge about the relative importance of local versus regional processes (Chase 2003;Cottenie and De Meester 2004). It can be assumed that the degree of isolation, and thereby the rate of exchange of cells and genes between communities, should have consequences for which forces shape local microbial communities (Curtis and Sloan 2004;Papke and Ward 2004).…”

mentioning

confidence: 99%

“…Central to understanding patterns in community structure is knowledge about the relative importance of local versus regional processes (Chase 2003;Cottenie and De Meester 2004). It can be assumed that the degree of isolation, and thereby the rate of exchange of cells and genes between communities, should have consequences for which forces shape local microbial communities (Curtis and Sloan 2004;Papke and Ward 2004).…”

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External control of bacterial community structure in lakes

et al. 2006

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Abstract-We investigated the importance of a regional factor for bacterial communities in lakes. External factors dominated the control of community structures in lakes with retention times up to 200 d, most likely as a result of bacterial import. Because these lakes are numerous in the boreal zone, regional processes can be of great importance for bacterial communities in general. Consequently, we propose that lakes function more like flow through systems, as opposed to the classical ''lake as microcosm '' concept. During the last decade, our knowledge about the diversity of bacteria in nature has increased enormously; however, little is understood about which factors are shaping bacterial communities (DeLong and Pace 2001;Zwart et al. 2002). Central to understanding patterns in community structure is knowledge about the relative importance of local versus regional processes (Chase 2003;Cottenie and De Meester 2004). It can be assumed that the degree of isolation, and thereby the rate of exchange of cells and genes between communities, should have consequences for which forces shape local microbial communities (Curtis and Sloan 2004;Papke and Ward 2004). In nature, a gradient in isolation of communities should exist from endosymbionts to those exhibiting a cosmopolitan distribution (Papke and Ward 2004).Early on, lakes and their ecosystems were assigned as isolated units in the ''lake as microcosm '' concept (Forbes 1887). This view of the lake was later revised, for instance, because of the discovery of the importance of allochthonous carbon for lake ecosystem function (Hessen and Tranvik 1998;Pace et al. 2004). Thus, lakes today are more often ecologically regarded as a part of a larger unit, i.e., the drainage basin (Soranno et al. 1999). Still, efforts in lake microbial ecology and diversity have largely focused on within-lake selective forces, rather than external influences on community structure and diversity, although it has been shown that lake (Crump et al. 2003;Masin et al. 2003; Lindström and Bergström 2004) and estuarine (Crump et al. 2004) community compositions can be largely influenced by inflowing bacteria. It can be assumed that the degree of isolation a lake bacterioplankton community experiences, and thereby the degree of influence by inflowing bacteria on local community structure, depends on the hydrological retention time of the lakes. Therefore, we used a range of lakes of different hydrological retention times to determine the magnitude of external influence on bacterial community structure in lakes. Our hypothesis was that lakes with short hydrological retention time should have bacterial communities that are more similar to those of the inflowing water than lakes with longer hydrological retention times because of the larger amount of imported bacteria to the former type of lake. Twelve relatively unproductive Swedish lakes with different hydrological retention times were studied (Table 1). We used denaturing gel electrophoresis (DGGE) of polymerase chain reaction (PCR)-amplified...

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Section: Materials and Methods-study Sites And Samplingmentioning

confidence: 99%

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confidence: 99%

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External control of bacterial community structure in lakes

et al. 2006

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“…Por outro lado, houve baixa similaridade entre as linhas das áreas mais secas e mais úmidas, evidenciando modificações na composição das espécies e na estrutura da vegetação, apesar do intervalo de confiança significativo para poucas comparações. Possivelmente, as diferenças na duração de alagamento entre as áreas funcionaram como um filtro selecionando espécies capazes de suportar tal condição (Chase 2003).…”

Section: Discussionunclassified

Relação entre a vegetação e as propriedades do solo em áreas de campo limpo úmido no Parque Nacional de Sete Cidades, Piauí, Brasil

et al. 2012

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ResumoO objetivo desse estudo foi avaliar a estrutura da camada herbáceo-subarbustiva em comunidades de campo limpo no Parque Nacional de Sete Cidades localizado no Piauí, e a sua relação com as variáveis edáficas e espaciais das áreas. A amostragem da vegetação foi realizada no final da estação chuvosa/início da seca, através do método de interseção na linha, para determinar a composição e a cobertura linear das espécies. Dezessete linhas de 10 m, subdivididas em seções de 1 m, foram distribuídas em seis áreas distintas. Amostras de solo (0-20 cm) foram coletadas para análises químicas e texturais. Foram amostrados 71 táxons relacionados a 46 gêneros e 25 famílias. A análise de correspondência canônica (CCA) separou as linhas amostradas em três grupos, associados as propriedades texturais e químicas do solos, que coincidiram com as áreas mais similares. O procedimento de permutação com múltiplas respostas (MRPP) detectou diferenças significativas entre os grupos da CCA. As variáveis ambientais mais fortemente correlacionadas foram Cu, Fe, saturação de alumínio, silte, Zn, saturação de bases e areia, explicando 37,9% da variação dos dados. A distância espacial entre as linhas foi responsável por 16,8% da variação explicada. A distribuição dos campos úmidos no Parque parece estar determinada pelos gradientes de textura e fertilidade dos solos. Palavras-chave: cerrado, estrato herbáceo, método de interseção na linha, variáveis ambientais. AbstractVariations in soil proprieties seem to determine the spatial distribution of plant communities in the moist grassland. The aim of this study was to evaluate the relationship between the floristic composition and structure of the herbaceous-subshrub layer and soil and spatial variables in grassland communities in the National Park of Sete Cidades, Piauí, Brazil. The composition and linear coverage of the species were assessed by the lineintercept method. A total of 17 lines of 10 m, subdivided in sections of 1 m, were distributed into six distinct areas. Soil samples were collected for chemical and textural analysis. We sampled 71 taxa in 46 genera and 25 families. Through canonical correspondence analysis (CCA) the lines sampled were separated into three groups, associated with the textural and chemical soil properties, which coincided with the most similar sites. The multi-response permutation procedures (MRPP) found significant differences between groups of the CCA. The environmental variables most strongly correlated were Cu, Fe, aluminum saturation, silt, Zn, base saturation and sand, accounting for 37.9% of data variation. The spatial distance between the lines accounted for 16.8% of the explained variance. The distribution of the wet grasslands in the park seems to be determined by texture and soil fertility gradients. Key words: cerrado, herbaceous layer, line-intercept method, environmental variables Relação entre a vegetação e as propriedades do solo em áreas de campo limpo úmido no Parque Nacional de Sete Cidades, Piauí, Brasil

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“…2012). In most ecosystems, community assembly is probably affected by both abiotic factors and priority effects, but the relative importance varies (Chase 2003, 2010). …”

Section: Introductionmentioning

confidence: 99%

Priority effects of early successional insects influence late successional fungi in dead wood

Jacobsen

Birkemoe

Sverdrup‐Thygeson

2015

Ecology and Evolution

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Community assembly is an integral process in all ecosystems, producing patterns of species distributions, biodiversity, and ecosystem functioning. Environmental filters and colonization history govern the assembly process, but their relative importance varies depending on the study system. Dead wood decomposition is a slow process, allowing decomposer communities to develop within a slowly changing substrate for decades. Despite this, there are few long‐term studies of priority effects from colonization history in this ecosystem. In this study, we investigate the importance of insects in early succession of dead wood on the fungal community present one decade later. Sixty aspen trees were killed in two study landscapes, each tree producing one aspen high stump and log. Insects were sampled with flight interception traps during the first 4 years after tree death, and fungal fruiting bodies were registered in year twelve. We found positive priority effects of two fungivorous beetles, the sap beetle Glischrochilus quadripunctatus and the round fungus beetle Agathidium nigripenne, on the Artist's bracket (Ganoderma applanatum) and a positive priority effect of wood‐boring beetles on the ascomycete Yellow fairy cup (Bisporella citrina). The Aspen bracket (Phellinus tremulae) did not respond to insects in early succession of the dead wood. Our results suggest that early successional insects can have significant, long‐lasting effects on the late successional fungal community in dead wood. Also, the effect can be specific, with one fungus species depending on one or a few fungivorous beetle species. This has implications for decomposition and biodiversity in dead wood, as loss of early colonizing beetles may also affect the successional pathways they seem to initiate.

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Community assembly: when should history matter?

Cited by 926 publications

References 68 publications

External control of bacterial community structure in lakes

External control of bacterial community structure in lakes

Relação entre a vegetação e as propriedades do solo em áreas de campo limpo úmido no Parque Nacional de Sete Cidades, Piauí, Brasil

Priority effects of early successional insects influence late successional fungi in dead wood

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