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Influence of anthropic and eco-hydrological factors on the floristic diversity of the herbaceous vegetation around the temporary ponds in Ferlo, Northern Senegal
Journal of Plant Ecology ( IF 2.7 ) Pub Date : 2021-06-04 , DOI: 10.1093/jpe/rtab053
Ndiabou Faye 1, 2, 3 , Aly Diallo 4 , Moustapha Bassimbé Sagna 1 , Jean Luc Peiry 5 , Papa Saliou Sarr 6 , Aliou Guisse 1, 2, 3
Affiliation  

Abstract
Aims
Temporary ponds play substantial roles in preserving biodiversity in the Sahel. This study investigated the influence of anthropic and eco-hydrological factors on the plant diversity around two grazed ponds and one ungrazed pond in Ferlo, northern Senegal.
Methods
Two phytoecological transects were established per pond. On each transect, homogeneous herbaceous vegetation units were identified and characterized (herbaceous cover, exposure, soil texture, soil moisture and pH, average height, and slope).
Important findings
The herbaceous flora comprised 55 species, 41 genera, and 22 families across the three ponds. Species of the Poaceae, particularly Eragrostis tremula and Enteropogon prieurii, mostly colonized the grazed ponds, while the ungrazed pond favored other families’ species such as Achyranthes sp, Commelina forsskaolii, Corchorus sp. The Shannon’s diversity index (H’) of Wendu Marodi (ungrazed pond ) was slightly higher (4.9 bits) than that of Belel Lougal and Belel Sow (grazed ponds) with 4.8 and 4.5 bits, respectively. The equitability indices were relatively high in the three ponds (0.85, 0.83, 0.78). Eco-ecological factors distinguished four species’ groupings: a Tribulus terrestris grouping colonizing the constraining and over-grazed zones, a Digitaria horizontalis grouping, and Chloris barbata grouping found in the transition zones, and an Achyranthes aspera grouping in the wetlands, where woody plants were strongly present and the anthropic action low. This study highlighted the importance of maintaining a landscape mosaic of ungrazed or semi-protected ponds and grazed ponds to preserve the herbaceous floristic diversity in the center of Ferlo (Senegal) and the Sahel in general.


中文翻译:

人为和生态水文因素对塞内加尔北部 Ferlo 临时池塘周围草本植被区系多样性的影响

摘要
宗旨
临时池塘在保护萨赫勒地区的生物多样性方面发挥着重要作用。本研究调查了人为和生态水文因素对塞内加尔北部 Ferlo 的两个放牧池塘和一个未放牧池塘周围植物多样性的影响。
方法
每个池塘建立两个植物生态断面。在每个横断面上,均质草本植被单元被识别和表征(草本覆盖、暴露、土壤质地、土壤水分和 pH 值、平均高度和坡度)。
重要发现
三个池塘的草本植物群包括 55 种、41 属、22 科。禾本科的物种,特别是Eragrostis tremulaEnteropogon prieurii,主要在放牧的池塘中定居,而未放牧的池塘则有利于其他科的物种,如牛膝Commelina forsskaoliiCorchorus sp。Wendu Marodi(未放牧池塘)的香农多样性指数(H')略高于 Belel Lougal 和 Belel Sow(放牧池塘)(4.9 位),分别为 4.8 和 4.5 位。三个池塘的公平性指数相对较高(0.85、0.83、0.78)。生态生态因素区分了四个物种的分组:Tribulus terrestris群在限制区和过度放牧区定殖,在过渡带中发现了Digitaria horizo​​ntalis群和Chloris barbata群,在湿地中发现了Achyranthes aspera群,在那里木本植物大量存在,人为活动低。这项研究强调了保持未放牧或半保护池塘和放牧池塘的景观镶嵌的重要性,以保护 Ferlo(塞内加尔)中心和整个萨赫勒地区的草本植物区系多样性。
更新日期:2021-06-05
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