2134/32844
Ian Thornhill
Ian
Thornhill
Jeremy Biggs
Jeremy
Biggs
Matthew J. Hill
Matthew J.
Hill
Robert A. Briers
Robert A.
Briers
David G. Gledhill
David G.
Gledhill
Paul Wood
Paul
Wood
John H. R. Gee
John H. R.
Gee
M. Ledger
M.
Ledger
Christopher Hassall
Christopher
Hassall
The functional response and resilience in small waterbodies along land-use and environmental gradients
Loughborough University
2018
Ecosystem functioning
Nutrient recycling
Response diversity
Ponds
Ecosystem services
Functional resilience
Earth Sciences not elsewhere classified
2018-05-04 14:59:27
Journal contribution
https://repository.lboro.ac.uk/articles/journal_contribution/The_functional_response_and_resilience_in_small_waterbodies_along_land-use_and_environmental_gradients/9482465
There is growing recognition of the essential services provided to humanity by functionally
intact ecosystems. Freshwater ecosystems are found throughout agricultural and urban landscapes and provide a wide range of ecosystem services, but globally they are also amongst the most vulnerable. In particular, ponds (lentic waters typically less than 2ha), provide natural flood management, sequester carbon and hold significant cultural value. However, to inform their management it is important to understand a) how functional
diversity varies in response to disturbance and b) the link between biodiversity conservation and ecosystem function. In this study, a meta-analysis of seven separate pond studies from across England and Wales was carried out to explore the effect of urban and agricultural land-use gradients, shading,
emergent vegetation, surface area and pH upon groups of functionally similar members of the
macroinvertebrate fauna. Functional effect groups were first identified by carrying out a
hierarchical cluster analysis using body size, voltinism and feeding habits (18 categories) that
are closely related to biogeochemical processes (e.g. nutrient and carbon recycling). Secondly, the influence of the gradients upon effect group membership (functional redundancy - FR) and the breadth of traits available to aid ecosystem recovery (response diversity) was assessed using species counts and functional dispersion (FDis) using 12 response traits. The effect of land-use gradients was unpredictable, whilst there was a
negative response in both FR and FDis to shading and positive responses to increases in
emergent vegetation cover and surface area. An inconsistent association between FDis and FR suggested that arguments for taxonomic biodiversity conservation in order to augment ecosystem functioning are too simplistic. Thus, a deeper understanding of the response of functional diversity to disturbance could have greater impact with decision-makers who may relate better to the loss of ecosystem function in response to environmental degradation than species loss alone.