NDLI: Interaction between patch area and shape: lakes with different formation processes have contrasting area and shape effects on macrophyte diversity

Content Provider	Springer Nature Link
Author	Soga, Masashi Ishiyama, buo Sueyoshi, Masanao Yamaura, Yuichi Hayashida, Kazufumi Koizumi, Itsuro Negishi, Junjiro N.
Copyright Year	2013
Abstract	Although both patch area and shape are key factors driving biodiversity in fragmented terrestrial landscapes, researchers have had limited and mixed success in documenting the effects of these two factors on aquatic ecosystems. Here we examined the effects of lake area and shape on macrophyte species richness in a lowland floodplain by considering the differences in lake types (i.e. marsh, oxbow, man-made lakes). We surveyed species richness of native macrophytes in 35 lakes including 11 marshes, 11 oxbows and 13 man-made lakes with various complex shapes covering from 0.25 to 46.3 ha. Model selection clearly supported the existence of interaction between area and shape effects: large-circular and small-complex lakes supported a higher macrophyte species richness, while it was lower in large-complex and small-circular lakes. Among the three lake types, marsh lakes were more circular and man-made lakes had more complex shapes, while oxbow lakes were intermediate between these two. Also, marsh lakes had positive species–area relationships, while man-made lakes had negative relationships. Our results suggest the opposing shape complexity and species–area relationships of these two contrasting lake types are the result of the interactions between lake area and shape. These results indicate that different lake types result in variations in their conservation value for preserving macrophyte diversity. We suggest that small complex-shaped patches (especially oxbow lakes), which are often given the lowest conservation priority in terrestrial ecosystems, cannot be disregarded when conserving macrophyte biodiversity in aquatic ecosystems.
Starting Page	55
Ending Page	64
Page Count	10
File Format	PDF
ISSN	18601871
Journal	Landscape and Ecological Engineering
Volume Number	10
Issue Number	1
e-ISSN	1860188X
Language	English
Publisher	Springer Japan
Publisher Date	2013-04-13
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Area–shape interaction Edge effect Floodplain lake Macrophyte assemblages Management Oxbow lake Landscape Ecology Nature Conservation Civil Engineering Environmental Management Landscape/Regional and Urban Planning Plant Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology Management, Monitoring, Policy and Law Nature and Landscape Conservation

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