Effects of a natural flood disturbance on species richness and beta diversity of stream benthic diatom communities

被引：10

作者：

Schneck, Fabiana ^{[1
,2
,4
]}

Lange, Katharina ^{[3
,4
]}

Melo, Adriano S. ^{[5
]}

Townsend, Colin R. ^{[4
]}

Matthaei, Christoph D. ^{[4
]}

机构：

[1] Univ Fed Rio Grande FURG, Inst Ciencias Biol, BR-96203900 Rio Grande, RS, Brazil

[2] Univ Fed Rio Grande do Sul, Dept Ecol, Programa Posgrad Ecol, BR-91501970 Porto Alegre, RS, Brazil

[3] EAWAG Swiss Fed Inst Aquat Sci & Technol, Dept Fish Ecol & Evolut, Kastanienbaum, Switzerland

[4] Univ Otago, Dept Zool, Dunedin, New Zealand

[5] Univ Fed Goias, Dept Ecol, ICB, BR-74690900 Goiania, Go, Brazil

来源：

AQUATIC ECOLOGY | 2017年 / 51卷 / 04期

关键词：

Benthic algae; Hydrological disturbance; New Zealand; Periphyton; Turnover; NEW-ZEALAND STREAM; ECOLOGICAL GUILDS; RESILIENCE; PERIPHYTON; PATCHINESS; RESISTANCE; PATTERNS; RECOVERY; BIODIVERSITY; ASSEMBLAGES;

D O I：

10.1007/s10452-017-9636-1

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Natural hydrological disturbances in streams may reduce biomass and species richness and change community composition within streams. Disturbances can also affect beta diversity among streams if their effects are species specific or vary across sites. We investigated the effect of a natural flood on species richness, community composition and among-streams beta diversity of benthic diatoms (total community and three functional groups: low profile, high profile and motile) of seven streams in New Zealand. Sampling occurred shortly before, 10 days after and 40 days after the flood. Species richness of the total diatom community did not change after the flood. The high-profile group was the only one whose species richness declined after the flood, whereas species richness of the low-profile group increased. Community composition changed after the flood, mostly as a result of species replacement rather than richness differences over time. Finally, among-streams beta diversity did not change after the flood, suggesting that variation in species composition of benthic diatoms among streams may be maintained in the face of flood disturbances.

引用

页码：557 / 569

页数：13

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