Universität zu Köln

Heidbuechel, Patrick, Sachs, Maria, Stanik, Nils ORCID: 0000-0002-9717-3826 and Hussner, Andreas (2019). Species-specific fragmentation rate and colonization potential partly explain the successful spread of aquatic plants in lowland streams. Hydrobiologia, 843 (1). S. 107 - 124. DORDRECHT: SPRINGER. ISSN 1573-5117

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Abstract

The vegetative spread potential of aquatic plant species is largely based on the quantity of dispersed plant fragments (propagule pressure) and their potential for regrowth and establishment, i.e., fragment regeneration and colonization. In streams, fragment dispersal is of particular significance as the exposure of plants to flow facilitates fragmentation and downstream drift of fragments. We conducted field investigations to quantify the relevance of fragment dispersal and the species-specific propagule pressure due to fragmentation in five small to medium-sized German streams. These field surveys were combined with determination of the potential for regeneration/colonization of fragments collected in the field indicated by relative root formation under standardized conditions. In general, the number of drifting fragments tended to increase with larger stream size. We documented species-specific differences in fragmentation rate, which contributed to weak correlations between the number of drift units and specific plant cover within four streams. The overall likelihood for root formation increased significantly with increasing fragment size and was highest for the invasive Elodea nuttallii (70% of fragments). We conclude that the fragment dispersal capacity in streams is highly species-specific and that propagule pressure alone cannot explain the successful spread of invasive species like Myriophyllum heterophyllum.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Heidbuechel, Patrick UNSPECIFIED UNSPECIFIED UNSPECIFIED Sachs, Maria UNSPECIFIED UNSPECIFIED UNSPECIFIED Stanik, Nils UNSPECIFIED orcid.org/0000-0002-9717-3826 UNSPECIFIED Hussner, Andreas UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-132213
DOI:	10.1007/s10750-019-04041-y
Journal or Publication Title:	Hydrobiologia
Volume:	843
Number:	1
Page Range:	S. 107 - 124
Date:	2019
Publisher:	SPRINGER
Place of Publication:	DORDRECHT
ISSN:	1573-5117
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MACROPHYTE-SPARGANIUM-ERECTUM; LIFE-HISTORY TRAITS; FRESH-WATER; CLONAL INTEGRATION; PHENOTYPIC PLASTICITY; PROPAGULE PRESSURE; ROOT ANCHORAGE; GROWTH-RATES; DISPERSAL; REGENERATION Multiple languages Marine & Freshwater Biology Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/13221