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Relationships between flower-visiting insects and forest cover in cocoa-growing landscapes in Ghana.

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Title: Relationships between flower-visiting insects and forest cover in cocoa-growing landscapes in Ghana.
Authors: Boakye, Richard G.1,2 (AUTHOR) rgboakye@yahoo.co.uk, Combey, Rofela3 (AUTHOR), White, Blánaid4,5 (AUTHOR), Stanley, Dara A.1,2 (AUTHOR)
Source: Landscape Ecology. Dec2024, Vol. 39 Issue 12, p1-17. 17p.
Subject Terms: *Forest insects, *Insect pollinators, *Insect communities, *Cacao, *Forest reserves
Abstract: Context: Increased cocoa cultivation (Theobroma cacao) has led to the conversion of over 6 million hectares of rainforest to cocoa farmlands in West Africa. Globally, pollinator decline has been driven by land use changes. Though land use change through cocoa expansion may affect insect pollinators and, by extension, pollination services, this has rarely been assessed. Objectives: Our study examined the relationships between the proportion of natural forest in the landscape (reduced primarily due to cocoa expansion) and flower-visiting insect abundance, and bee abundance, richness, diversity and community composition. The effect of pan trap type (aerial or ground) was also tested. Methods: Eighteen sites were selected along a gradient of an increasing proportion of natural forests in the surrounding landscape (from 9 to 100%). Ground and aerial pan traps were deployed in each site to sample flower-visiting insects. Two sampling sessions were conducted; during the rainy season in 2021 and during the dry season in 2022. Results: The abundances of Coleoptera, Hymenoptera and Hemiptera increased with increasing proportion of natural forests in the landscape, while Diptera decreased. Natural forest and trap type did not significantly influence bee abundance, species richness, and Shannon diversity. However, bee community composition differed along the forest gradient, indicating that forests and cocoa farms harbour different bee communities. Ground pan traps captured more insects (61% of 19,927 flower-visiting insects) than aerial pan traps, which was driven by the Diptera as the abundances of the other orders were not significantly related to trap type. Conclusions: Preserving natural forest in cocoa-growing landscapes is important to sustain the coexistence of diverse flower-visiting insect communities owing to their differential responses to the proportions of natural forests. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Relationships between flower-visiting insects and forest cover in cocoa-growing landscapes in Ghana.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Boakye%2C+Richard+G%2E%22">Boakye, Richard G.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> rgboakye@yahoo.co.uk</i><br /><searchLink fieldCode="AR" term="%22Combey%2C+Rofela%22">Combey, Rofela</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22White%2C+Blánaid%22">White, Blánaid</searchLink><relatesTo>4,5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Stanley%2C+Dara+A%2E%22">Stanley, Dara A.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Landscape+Ecology%22">Landscape Ecology</searchLink>. Dec2024, Vol. 39 Issue 12, p1-17. 17p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Forest+insects%22">Forest insects</searchLink><br />*<searchLink fieldCode="DE" term="%22Insect+pollinators%22">Insect pollinators</searchLink><br />*<searchLink fieldCode="DE" term="%22Insect+communities%22">Insect communities</searchLink><br />*<searchLink fieldCode="DE" term="%22Cacao%22">Cacao</searchLink><br />*<searchLink fieldCode="DE" term="%22Forest+reserves%22">Forest reserves</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Context: Increased cocoa cultivation (Theobroma cacao) has led to the conversion of over 6 million hectares of rainforest to cocoa farmlands in West Africa. Globally, pollinator decline has been driven by land use changes. Though land use change through cocoa expansion may affect insect pollinators and, by extension, pollination services, this has rarely been assessed. Objectives: Our study examined the relationships between the proportion of natural forest in the landscape (reduced primarily due to cocoa expansion) and flower-visiting insect abundance, and bee abundance, richness, diversity and community composition. The effect of pan trap type (aerial or ground) was also tested. Methods: Eighteen sites were selected along a gradient of an increasing proportion of natural forests in the surrounding landscape (from 9 to 100%). Ground and aerial pan traps were deployed in each site to sample flower-visiting insects. Two sampling sessions were conducted; during the rainy season in 2021 and during the dry season in 2022. Results: The abundances of Coleoptera, Hymenoptera and Hemiptera increased with increasing proportion of natural forests in the landscape, while Diptera decreased. Natural forest and trap type did not significantly influence bee abundance, species richness, and Shannon diversity. However, bee community composition differed along the forest gradient, indicating that forests and cocoa farms harbour different bee communities. Ground pan traps captured more insects (61% of 19,927 flower-visiting insects) than aerial pan traps, which was driven by the Diptera as the abundances of the other orders were not significantly related to trap type. Conclusions: Preserving natural forest in cocoa-growing landscapes is important to sustain the coexistence of diverse flower-visiting insect communities owing to their differential responses to the proportions of natural forests. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1007/s10980-024-02003-x
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 17
        StartPage: 1
    Subjects:
      – SubjectFull: Forest insects
        Type: general
      – SubjectFull: Insect pollinators
        Type: general
      – SubjectFull: Insect communities
        Type: general
      – SubjectFull: Cacao
        Type: general
      – SubjectFull: Forest reserves
        Type: general
    Titles:
      – TitleFull: Relationships between flower-visiting insects and forest cover in cocoa-growing landscapes in Ghana.
        Type: main
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            NameFull: Boakye, Richard G.
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            NameFull: Combey, Rofela
      – PersonEntity:
          Name:
            NameFull: White, Blánaid
      – PersonEntity:
          Name:
            NameFull: Stanley, Dara A.
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          Dates:
            – D: 01
              M: 12
              Text: Dec2024
              Type: published
              Y: 2024
          Identifiers:
            – Type: issn-print
              Value: 09212973
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            – Type: volume
              Value: 39
            – Type: issue
              Value: 12
          Titles:
            – TitleFull: Landscape Ecology
              Type: main
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