Level of urbanization and habitat type, and not patch size, influence predacious arthropod diversity patterns of urban grasslands in South Africa

Abstract. Greyvenstein B, Botha M, van den Berg J, Siebert SJ. 2021. Level of urbanization and habitat type, and not patch size, influence predacious arthropod diversity patterns of urban grasslands in South Africa. Biodiversitas 22: 4078-4094. Predacious arthropods provide a valuable ecosystem serv...

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Autores principales:	Bianca Greyvenstein, Monique Botha, Johnnie van den Berg, Stefan Siebert
Formato:	article
Lenguaje:	EN
Publicado:	MBI & UNS Solo 2021
Materias:	conservation disturbance green space predacious urbanization Biology (General) QH301-705.5
Acceso en línea:	https://doaj.org/article/ef62cc9ac41d4dc49a07a5784fa8022c
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spelling	oai:doaj.org-article:ef62cc9ac41d4dc49a07a5784fa8022c2021-11-22T12:18:55ZLevel of urbanization and habitat type, and not patch size, influence predacious arthropod diversity patterns of urban grasslands in South Africa1412-033X2085-472210.13057/biodiv/d220957https://doaj.org/article/ef62cc9ac41d4dc49a07a5784fa8022c2021-09-01T00:00:00Zhttps://smujo.id/biodiv/article/view/9122https://doaj.org/toc/1412-033Xhttps://doaj.org/toc/2085-4722Abstract. Greyvenstein B, Botha M, van den Berg J, Siebert SJ. 2021. Level of urbanization and habitat type, and not patch size, influence predacious arthropod diversity patterns of urban grasslands in South Africa. Biodiversitas 22: 4078-4094. Predacious arthropods provide a valuable ecosystem service within urban environments by suppressing pest numbers. However, urban ecological studies largely ignore this functional group and its diversity and species composition patterns. Some studies have been published regarding these patterns, however they were mostly done in Australia, Europe and America, thus an African perspective is lacking. Our aim was to address the gap in African literature by quantify the differences in predacious arthropod species richness and diversity within urban green space in varying urbanization intensities, habitat types of grassland and patch sizes in South Africa. Various indices were considered to examine the effect of urbanization on the diversity patterns of Chrysopidae (Neuroptera), Mantodea, Araneae and Coccinellidae (Coleoptera). Study sites included three levels of urbanization represented by population density, two types of urban grasslands (i.e., ruderal and fragmented grassland) and a peri-urban rangeland grassland as control, and a wide range of patch sizes. Our results indicated that an increase in urbanization intensities was associated with increased abundance of predacious arthropod taxa. Also, that urban and peri-urban grasslands had similar predacious arthropod species richness and diversity, but differed in species composition. No relationship was found between patch size and arthropod diversity or composition. Thus, predacious arthropod abundances are influenced by the level of urbanization and their species composition is influenced by the type of urban grassland (ruderal or fragmented), which are important considerations for future urban planning/management and conservation strategies. This study gives a South African perspective and indicates that despite the lack of assigned function of urban green spaces, they sustain diverse and distinct predacious arthropod communities, which in turn fulfill various roles in a functioning ecosystem.Bianca GreyvensteinMonique BothaJohnnie van den BergStefan SiebertMBI & UNS Soloarticleconservationdisturbancegreen spacepredaciousurbanizationBiology (General)QH301-705.5ENBiodiversitas, Vol 22, Iss 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	conservation disturbance green space predacious urbanization Biology (General) QH301-705.5
spellingShingle	conservation disturbance green space predacious urbanization Biology (General) QH301-705.5 Bianca Greyvenstein Monique Botha Johnnie van den Berg Stefan Siebert Level of urbanization and habitat type, and not patch size, influence predacious arthropod diversity patterns of urban grasslands in South Africa
description	Abstract. Greyvenstein B, Botha M, van den Berg J, Siebert SJ. 2021. Level of urbanization and habitat type, and not patch size, influence predacious arthropod diversity patterns of urban grasslands in South Africa. Biodiversitas 22: 4078-4094. Predacious arthropods provide a valuable ecosystem service within urban environments by suppressing pest numbers. However, urban ecological studies largely ignore this functional group and its diversity and species composition patterns. Some studies have been published regarding these patterns, however they were mostly done in Australia, Europe and America, thus an African perspective is lacking. Our aim was to address the gap in African literature by quantify the differences in predacious arthropod species richness and diversity within urban green space in varying urbanization intensities, habitat types of grassland and patch sizes in South Africa. Various indices were considered to examine the effect of urbanization on the diversity patterns of Chrysopidae (Neuroptera), Mantodea, Araneae and Coccinellidae (Coleoptera). Study sites included three levels of urbanization represented by population density, two types of urban grasslands (i.e., ruderal and fragmented grassland) and a peri-urban rangeland grassland as control, and a wide range of patch sizes. Our results indicated that an increase in urbanization intensities was associated with increased abundance of predacious arthropod taxa. Also, that urban and peri-urban grasslands had similar predacious arthropod species richness and diversity, but differed in species composition. No relationship was found between patch size and arthropod diversity or composition. Thus, predacious arthropod abundances are influenced by the level of urbanization and their species composition is influenced by the type of urban grassland (ruderal or fragmented), which are important considerations for future urban planning/management and conservation strategies. This study gives a South African perspective and indicates that despite the lack of assigned function of urban green spaces, they sustain diverse and distinct predacious arthropod communities, which in turn fulfill various roles in a functioning ecosystem.
format	article
author	Bianca Greyvenstein Monique Botha Johnnie van den Berg Stefan Siebert
author_facet	Bianca Greyvenstein Monique Botha Johnnie van den Berg Stefan Siebert
author_sort	Bianca Greyvenstein
title	Level of urbanization and habitat type, and not patch size, influence predacious arthropod diversity patterns of urban grasslands in South Africa
title_short	Level of urbanization and habitat type, and not patch size, influence predacious arthropod diversity patterns of urban grasslands in South Africa
title_full	Level of urbanization and habitat type, and not patch size, influence predacious arthropod diversity patterns of urban grasslands in South Africa
title_fullStr	Level of urbanization and habitat type, and not patch size, influence predacious arthropod diversity patterns of urban grasslands in South Africa
title_full_unstemmed	Level of urbanization and habitat type, and not patch size, influence predacious arthropod diversity patterns of urban grasslands in South Africa
title_sort	level of urbanization and habitat type, and not patch size, influence predacious arthropod diversity patterns of urban grasslands in south africa
publisher	MBI & UNS Solo
publishDate	2021
url	https://doaj.org/article/ef62cc9ac41d4dc49a07a5784fa8022c
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Level of urbanization and habitat type, and not patch size, influence predacious arthropod diversity patterns of urban grasslands in South Africa

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