Thornhill, I, Biggs, J, Hill, M, Briers, R, Gledhill, D, Wood, P, Gee, J and Hassall, C (2018) 'The functional response and resilience in small waterbodies along land-use and environmental gradients.' Global Change Biology. ISSN 1354-1013

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Official URL: https://doi.org/10.1111/gcb.14149

Abstract

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 the 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.

Item Type: Article
Note:

The supporting information for this article is available via the publisher at the URL above.

Keywords: ecosystem functioning, ecosystem services, functional resilience, nutrient recycling, ponds, response diversity
Subjects: G Geography. Anthropology. Recreation > G Geography (General)
G Geography. Anthropology. Recreation > GB Physical geography
G Geography. Anthropology. Recreation > GE Environmental Sciences
Q Science > QH Natural history
Q Science > QH Natural history > QH301 Biology
Divisions: College of Liberal Arts
Date Deposited: 04 Apr 2018 13:56
Last Modified: 07 Jun 2018 12:55
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