Staff View: How do management decisions impact butterfly assemblages in smallholding oil palm plantations in Peninsular Malaysia?

How do management decisions impact butterfly assemblages in smallholding oil palm plantations in Peninsular Malaysia?

In the world's leading palm oil-producing countries (Indonesia and Malaysia), smallholders make up about 40 per cent of total oil palm plantation area. Management in smallholdings can be highly variable, ranging from intensive monoculture to polyculture systems, especially in the earlier years...

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Main Authors:	Harianja, Martina F., Stone, Jake, Mamat, Wan Z. W., Hadi, Muhamad A., Luke, Sarah H., Azhar, Badrul, Turner, Edgar C.
Format:	Article
Language:	English
Published:	John Wiley and Sons 2024
Online Access:	http://psasir.upm.edu.my/id/eprint/112051/1/112051.pdf http://psasir.upm.edu.my/id/eprint/112051/ https://besjournals.onlinelibrary.wiley.com/doi/pdfdirect/10.1111/1365-2664.14615
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spelling	my.upm.eprints.1120512024-10-28T03:52:23Z http://psasir.upm.edu.my/id/eprint/112051/ How do management decisions impact butterfly assemblages in smallholding oil palm plantations in Peninsular Malaysia? Harianja, Martina F. Stone, Jake Mamat, Wan Z. W. Hadi, Muhamad A. Luke, Sarah H. Azhar, Badrul Turner, Edgar C. In the world's leading palm oil-producing countries (Indonesia and Malaysia), smallholders make up about 40 per cent of total oil palm plantation area. Management in smallholdings can be highly variable, ranging from intensive monoculture to polyculture systems, especially in the earlier years of cultivation when open canopies allow a variety of understorey crop types to be grown alongside oil palm. Currently, many plantations in the region are mature and due to be replanted, which is likely to have substantial impacts on the ecosystems within them, but studies investigating the impacts of alternative post-replanting management strategies in smallholder plantations are lacking. We investigated the impacts of replanting and choice of crop management following replanting (growing oil palm as a monoculture or polyculture) on habitat structure and complexity, and on the abundance, richness and composition of butterfly assemblages in smallholding oil palm plantations in Banting, Selangor, Malaysia. We also assessed the direct effects of habitat structure and complexity on butterfly assemblages. Butterflies are likely to be a valuable indicator group for monitoring the impacts of management practices on biodiversity as butterfly species also show a range of sensitivities to habitat disturbance, with some being vulnerable to change, but others being common in plantations. They are also a functionally important group that pollinate wild plants, are prey for larger species and are common in tropical systems. Across 27 plantations, we recorded 1227 butterflies from 5 families, 46 genera and 56 species. Habitat structure and complexity differed between management decisions (mature monoculture, immature monoculture, immature polyculture), although many environmental parameters overlapped. We found no significant differences in species richness, density and assemblage composition of butterflies between management decisions. However, changes in local environmental conditions, such as an increase in the coverage of understorey vegetation, increased the abundance of butterflies. Synthesis and applications. Our findings suggest that replanting oil palm and choice of mono or polyculture have relatively few effects on butterflies, but management for specific features in plantations could benefit butterfly assemblages. © 2024 The Authors. Journal of Applied Ecology published by John Wiley & Sons Ltd on behalf of British Ecological Society. John Wiley and Sons 2024 Article PeerReviewed text en cc_by_4 http://psasir.upm.edu.my/id/eprint/112051/1/112051.pdf Harianja, Martina F. and Stone, Jake and Mamat, Wan Z. W. and Hadi, Muhamad A. and Luke, Sarah H. and Azhar, Badrul and Turner, Edgar C. (2024) How do management decisions impact butterfly assemblages in smallholding oil palm plantations in Peninsular Malaysia? Journal of Applied Ecology, 61 (4). pp. 759-772. ISSN 0021-8901; eISSN: 1365-2664 https://besjournals.onlinelibrary.wiley.com/doi/pdfdirect/10.1111/1365-2664.14615 10.1111/1365-2664.14615
institution	Universiti Putra Malaysia
building	UPM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Putra Malaysia
content_source	UPM Institutional Repository
url_provider	http://psasir.upm.edu.my/
language	English
description	In the world's leading palm oil-producing countries (Indonesia and Malaysia), smallholders make up about 40 per cent of total oil palm plantation area. Management in smallholdings can be highly variable, ranging from intensive monoculture to polyculture systems, especially in the earlier years of cultivation when open canopies allow a variety of understorey crop types to be grown alongside oil palm. Currently, many plantations in the region are mature and due to be replanted, which is likely to have substantial impacts on the ecosystems within them, but studies investigating the impacts of alternative post-replanting management strategies in smallholder plantations are lacking. We investigated the impacts of replanting and choice of crop management following replanting (growing oil palm as a monoculture or polyculture) on habitat structure and complexity, and on the abundance, richness and composition of butterfly assemblages in smallholding oil palm plantations in Banting, Selangor, Malaysia. We also assessed the direct effects of habitat structure and complexity on butterfly assemblages. Butterflies are likely to be a valuable indicator group for monitoring the impacts of management practices on biodiversity as butterfly species also show a range of sensitivities to habitat disturbance, with some being vulnerable to change, but others being common in plantations. They are also a functionally important group that pollinate wild plants, are prey for larger species and are common in tropical systems. Across 27 plantations, we recorded 1227 butterflies from 5 families, 46 genera and 56 species. Habitat structure and complexity differed between management decisions (mature monoculture, immature monoculture, immature polyculture), although many environmental parameters overlapped. We found no significant differences in species richness, density and assemblage composition of butterflies between management decisions. However, changes in local environmental conditions, such as an increase in the coverage of understorey vegetation, increased the abundance of butterflies. Synthesis and applications. Our findings suggest that replanting oil palm and choice of mono or polyculture have relatively few effects on butterflies, but management for specific features in plantations could benefit butterfly assemblages. © 2024 The Authors. Journal of Applied Ecology published by John Wiley & Sons Ltd on behalf of British Ecological Society.
format	Article
author	Harianja, Martina F. Stone, Jake Mamat, Wan Z. W. Hadi, Muhamad A. Luke, Sarah H. Azhar, Badrul Turner, Edgar C.
spellingShingle	Harianja, Martina F. Stone, Jake Mamat, Wan Z. W. Hadi, Muhamad A. Luke, Sarah H. Azhar, Badrul Turner, Edgar C. How do management decisions impact butterfly assemblages in smallholding oil palm plantations in Peninsular Malaysia?
author_facet	Harianja, Martina F. Stone, Jake Mamat, Wan Z. W. Hadi, Muhamad A. Luke, Sarah H. Azhar, Badrul Turner, Edgar C.
author_sort	Harianja, Martina F.
title	How do management decisions impact butterfly assemblages in smallholding oil palm plantations in Peninsular Malaysia?
title_short	How do management decisions impact butterfly assemblages in smallholding oil palm plantations in Peninsular Malaysia?
title_full	How do management decisions impact butterfly assemblages in smallholding oil palm plantations in Peninsular Malaysia?
title_fullStr	How do management decisions impact butterfly assemblages in smallholding oil palm plantations in Peninsular Malaysia?
title_full_unstemmed	How do management decisions impact butterfly assemblages in smallholding oil palm plantations in Peninsular Malaysia?
title_sort	how do management decisions impact butterfly assemblages in smallholding oil palm plantations in peninsular malaysia?
publisher	John Wiley and Sons
publishDate	2024
url	http://psasir.upm.edu.my/id/eprint/112051/1/112051.pdf http://psasir.upm.edu.my/id/eprint/112051/ https://besjournals.onlinelibrary.wiley.com/doi/pdfdirect/10.1111/1365-2664.14615
_version_	1814936521657024512
score	13.211869

How do management decisions impact butterfly assemblages in smallholding oil palm plantations in Peninsular Malaysia?

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