干旱区生态环境知识资源中心(Arid): Effects of aquatic vegetation cover (Schoenoplectus decipiens) on microalgal biomass and assemblage structure in temporary wetlands of a semi-arid region (Eastern Cape Karoo, South Africa)

Arid

DOI	10.1016/j.sajb.2020.10.016
	Effects of aquatic vegetation cover (Schoenoplectus decipiens) on microalgal biomass and assemblage structure in temporary wetlands of a semi-arid region (Eastern Cape Karoo, South Africa)
	Roussouw, N.; Bird, M. S.; Perissinotto, R.
通讯作者	Bird, MS (corresponding author), Univ Johannesburg, Dept Zool, ZA-2006 Auckland Pk, South Africa.
来源期刊	SOUTH AFRICAN JOURNAL OF BOTANY
ISSN	0254-6299
EISSN	1727-9321
出版年	2021
卷号	137 页码:183-196
英文摘要	Temporary depression wetlands are often overlooked from a conservation and research perspective, despite recent evidence suggesting that their cumulative contribution to biodiversity at the landscape level is substantial. Here, we present observations aimed at understanding the significance of macrophyte cover in relation to the lower trophic levels, more particularly microalgae, within these highly dynamic wetlands. Thirteen such wetlands were sampled during October 2015, December 2015 and March 2016 in the Eastern Cape Karoo region of South Africa, to test the hypotheses that densely vegetated wetlands will have lower microalgal biomass and smaller algal size classes than sparsely vegetated wetlands. PERMANOVA results indicated that neither planktonic nor benthic microalgal biomass differed significantly between macrophyte cover categories (sparse, moderate and extensive cover), although there was a strong difference between the planktonic and benthic biotopes themselves. Planktonic and benthic microalgal assemblages were dominated by cryptophytes and chrysophytes (flagellates) throughout the study, with smaller nanoplankton being more abundant in wetlands with moderate or extensive macrophyte cover and larger microplankton dominating sparsely vegetated sites. Median benthic diatom species richness and diversity were higher under sparse macrophyte cover, but these differences were not significant, and no convincing evidence was found for an effect of macrophyte cover on microalgal biomass and assemblage composition in these temporary wetlands. Using distance-based Redundancy Analysis, dissolved inorganic nitrogen appeared to be the only environmental predictor for which a significant relationship with microalgal assemblage composition was reported. This study adds to the evidence from other assemblages (e.g. invertebrates) suggesting that the generalist nature of species occupying these systems allows them to adapt to the ever-changing conditions typical of ephemeral environments. ? 2020 SAAB. Published by Elsevier B.V. All rights reserved.
英文关键词	Diatoms Dryland ecosystems Ephemeral ecosystems Macrophytes Microalgae
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000644371800018
WOS关键词	FRESH-WATER ; MACROINVERTEBRATE ASSEMBLAGES ; SURFACE WATERBODIES ; NUTRIENT LIMITATION ; BENTHIC MICROALGAE ; RIVER-BASIN ; PHYTOPLANKTON ; MACROPHYTES ; COMMUNITIES ; PHOSPHORUS
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/351796
作者单位	[Roussouw, N.; Bird, M. S.; Perissinotto, R.] Nelson Mandela Univ, Coastal & Marine Res CMR, ZA-6031 Port Elizabeth, South Africa; [Bird, M. S.] Univ Johannesburg, Dept Zool, ZA-2006 Auckland Pk, South Africa
推荐引用方式 GB/T 7714	Roussouw, N.,Bird, M. S.,Perissinotto, R.. Effects of aquatic vegetation cover (Schoenoplectus decipiens) on microalgal biomass and assemblage structure in temporary wetlands of a semi-arid region (Eastern Cape Karoo, South Africa)[J],2021,137:183-196.
APA	Roussouw, N.,Bird, M. S.,&Perissinotto, R..(2021).Effects of aquatic vegetation cover (Schoenoplectus decipiens) on microalgal biomass and assemblage structure in temporary wetlands of a semi-arid region (Eastern Cape Karoo, South Africa).SOUTH AFRICAN JOURNAL OF BOTANY,137,183-196.
MLA	Roussouw, N.,et al."Effects of aquatic vegetation cover (Schoenoplectus decipiens) on microalgal biomass and assemblage structure in temporary wetlands of a semi-arid region (Eastern Cape Karoo, South Africa)".SOUTH AFRICAN JOURNAL OF BOTANY 137(2021):183-196.