Investigating invertebrate biodiversity around large wood: taxonomic vs functional metrics
- PDF / 1,301,341 Bytes
- 13 Pages / 595.276 x 790.866 pts Page_size
- 105 Downloads / 173 Views
Aquatic Sciences
RESEARCH ARTICLE
Investigating invertebrate biodiversity around large wood: taxonomic vs functional metrics Chiara Magliozzi1,2 · Albin Meyer3 · Philippe Usseglio‑Polatera3 · Anne Robertson4 · Robert C. Grabowski1 Received: 31 July 2019 / Accepted: 15 July 2020 © The Author(s) 2020
Abstract Large wood is a key component of river channels that affects numerous hydrological, physical and geomorphological processes. It promotes a diversity of benthic habitats in-channel and has shown to support more abundant and diverse benthic macroinvertebrate assemblages in previous ecological studies. However, the effects of large wood on the structural and functional diversities of hyporheic invertebrates are less well studied, and simultaneous examination of these diversity metrics on hyporheic and benthic compartments of the stream bed has not been conducted previously. Therefore, this study investigates the taxonomic and functional diversities of hyporheic and benthic invertebrate assemblages around natural accumulations of large wood in a British lowland river. Taxonomic and functional diversities were partitioned (into alpha, beta, and gamma diversities) and examined in reaches with and without large wood (control). We found that functional diversity is often decoupled from taxonomic diversity, demonstrating a functional redundancy of the macroinvertebrate assemblage for both hyporheic and benthic zones. Moreover, the highest functional variability at alpha-scale was observed in large wood habitats, which suggests that taxonomic diversity is enhanced by the small-scale environmental heterogeneity around large wood. To this end, this study contributes empirical evidence of functional and structural responses of invertebrates to large wood accumulation. Such information could be used to better understand the ecological implications of restoration works in lowland rivers and guide more effective management strategies. Keywords Diversity partitioning · Hyporheic zone · River · Macrofauna · Meiofauna · Rao index
Introduction
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00027-020-00745-9) contains supplementary material, which is available to authorized users. * Chiara Magliozzi [email protected] 1
Water Science Institute, School of Water, Energy and Environment, Cranfield University, Cranfield, Bedfordshire MK43 0AL, UK
2
CNR-ISTI, Area Della Ricerca CNR, via G. Moruzzi 1, 56124 Pisa, Italy
3
Laboratoire Interdisciplinaire Des Environnements Continentaux (LIEC, CNRS UMR 7360), Université de Lorraine, 57070 Metz, France
4
Department of Life Sciences, Roehampton University, Holybourne Avenue, London SW15 4JD, UK
Large wood (LW) has a profound impact on fluvial processes and ecosystems (Grabowski et al. 2019). LW drives river hydrological, physical and ecological processes, as a result of its interactions with water, sediment and biological communities (Wohl 2013). Previous ecological studies of benthic macroinvertebrate ass
Data Loading...
