Environmental Heterogeneity in Space and Time: Patch Use, Recruitment and Dynamics of a Rock Pool Population of a Gyrinid Beetle

Oikos ◽  
1999 ◽  
Vol 84 (2) ◽  
pp. 227 ◽  
Author(s):  
Bo W. Svensson
Keyword(s):  
Environmental Heterogeneity ◽  
Rock Pool ◽  
Patch Use ◽  
Space And Time ◽  
Pool Population

scholarly journals Scaling up biodiversity–ecosystem functioning relationships: the role of environmental heterogeneity in space and time

2021 ◽  
Vol 288 (1946) ◽  
pp. 20202779
Author(s):  
Patrick L. Thompson ◽  
Sonia Kéfi ◽  
Yuval R. Zelnik ◽  
Laura E. Dee ◽  
Shaopeng Wang ◽  
...  
Keyword(s):  
Environmental Conditions ◽  
Ecosystem Functioning ◽  
Environmental Heterogeneity ◽  
Community Dynamics ◽  
Formal Model ◽  
Spatial Scales ◽  
Scale Dependence ◽  
Space And Time ◽  
Number Of Species

The biodiversity and ecosystem functioning (BEF) relationship is expected to be scale-dependent. The autocorrelation of environmental heterogeneity is hypothesized to explain this scale dependence because it influences how quickly biodiversity accumulates over space or time. However, this link has yet to be demonstrated in a formal model. Here, we use a Lotka–Volterra competition model to simulate community dynamics when environmental conditions vary across either space or time. Species differ in their optimal environmental conditions, which results in turnover in community composition. We vary biodiversity by modelling communities with different sized regional species pools and ask how the amount of biomass per unit area depends on the number of species present, and the spatial or temporal scale at which it is measured. We find that more biodiversity is required to maintain functioning at larger temporal and spatial scales. The number of species required increases quickly when environmental autocorrelation is low, and slowly when autocorrelation is high. Both spatial and temporal environmental heterogeneity lead to scale dependence in BEF, but autocorrelation has larger impacts when environmental change is temporal. These findings show how the biodiversity required to maintain functioning is expected to increase over space and time.

scholarly journals The influence of environmental variables on spatial and temporal phytoplankton dissimilarity in a large shallow subtropical lake (Lake Mangueira, southern Brazil)

2014 ◽  
Vol 26 (2) ◽  
pp. 111-118 ◽  
Author(s):  
Luciane Oliveira Crossetti ◽  
Fabiana Schneck ◽  
Lacina Maria Freitas-Teixeira ◽  
David da Motta-Marques
Keyword(s):  
Aquatic Ecosystems ◽  
Environmental Variables ◽  
Environmental Heterogeneity ◽  
Phytoplankton Community ◽  
Environmental Data ◽  
Southern Brazil ◽  
Biological Communities ◽  
Subtropical Lake ◽  
Space And Time ◽  
The Relationship

AIM: The uneven distribution of organisms in aquatic ecosystems is generally attributed to environmental heterogeneity in both space and time, reflecting the occurrence of appropriate environmental conditions and the availability of resources to biological communities. The aim of this study was to understand how the dissimilarity of the phytoplankton community in a large subtropical shallow lake is related to environmental dissimilarities. METHODS: Biotic and environmental data were gathered at 19 sites along the 90-km length of Lake Mangueira. Sampling was carried out quarterly during 2010 and 2011, totaling 152 sampling units. The relationship between phytoplankton dissimilarity and the dissimilarity of environmental variables was assessed by the BioEnv analysis. MAJOR RESULTS: There is a significant relationship between phytoplankton dissimilarity and environmental dissimilarity. The model that best explained the dissimilarity of phytoplankton among the sampling units included pH, turbidity and nitrate. CONCLUSIONS: The dissimilarity of phytoplankton was related to the dissimilarity, which were directly associated to the variability of conditions and resources in space and time in Lake Mangueira.

Extended Patch Use Delays Bleeding by 54 Days

2005 ◽  
Vol 38 (2) ◽  
pp. 36-37
Author(s):  
HEIDI SPLETE
Keyword(s):  
Patch Use

Languages in Space and Time

2020 ◽  
Author(s):  
Marco Patriarca ◽  
Els Heinsalu ◽  
Jean Leó Leonard
Keyword(s):  
Space And Time

On Space and Time

2008 ◽  
Author(s):  
Alain Connes ◽  
Michael Heller ◽  
Roger Penrose ◽  
John Polkinghorne ◽  
Andrew Taylor
Keyword(s):  
Space And Time

Does the EEG Reflect Space- and Time-Coded Cerebral Functions?

1979 ◽  
Vol 24 (10) ◽  
pp. 824-824 ◽  
Author(s):  
DONALD B. LINDSLEY
Keyword(s):  
Space And Time
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