南非草地多样性丧失的植物区系评估

IF 0.8 4区生物学 Q4 PLANT SCIENCES

Bothalia Pub Date : 2021-02-24 DOI:10.38201/BTHA.ABC.V51.I1.11

M. Muller, S. Siebert, B. Ntloko, F. Siebert

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引用次数: 11

摘要

背景:土地利用对草地植物区系的影响是难以预测的，因为我们对这种变化所导致的物种损失知之甚少。目的:通过对比改造与未改造草地物种多样性和组成的变化。方法:在18个改造过的场地(代表农业和城市土地利用)和邻近未改造的草地中取样成对样地的植物区系。结果:特有种和受威胁物种受到转化的不利影响，特别是具有地下芽库和储存器官的物种。物种组成在转化过程中平均变化超过90%，优势科变化明显。结论:土地利用改造导致本地物种减少，外来入侵物种增加。

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A floristic assessment of grassland diversity loss in South Africa

Background: Land-use effects on grassland flora are difficult to predict due to poor understanding of species losses caused by transformation.Objectives: To determine changes in species diversity and composition by comparing transformed with untransformed grassland.Methods: Floristics of paired plots were sampled within 18 transformed sites (representing agricultural and urban land-uses) and neighbouring untransformed grassland.Results: Endemic and threatened species were negatively affected by transformation, particularly species with belowground bud-banks and storage organs. Species composition, with clear shifts in dominant families, was changed by over 90% on average by transformation.Conclusion: Land-use transformation leads to the loss of native species and increased alien invasive species.

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来源期刊

Bothalia 生物-植物科学

CiteScore

1.70

自引率

0.00%

发文量

期刊介绍： Bothalia: African Biodiversity & Conservation is published by AOSIS for the South African National Biodiversity Institute (SANBI) and aims to disseminate knowledge, information and innovative approaches that promote and enhance the wise use and management of biodiversity in order to sustain the systems and species that support and benefit the people of Africa. The journal was previously published as Bothalia, and had served the South African botanical community since 1921. However the expanded mandate of SANBI necessitated a broader scope for the journal, and in 2014, the subtitle, African Biodiversity & Conservation was added to reflect this change.