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Article: Seasonal variation and crop diversity shape the composition of bird communities in agricultural landscapes in Nepal

TitleSeasonal variation and crop diversity shape the composition of bird communities in agricultural landscapes in Nepal
Authors
KeywordsAgricultural land
Avian conservation
Avian diversity
Farmland birds
Feeding guild
Grassland bird
Mixed crop
South Asia
Sugarcane field
Issue Date1-Aug-2022
PublisherElsevier
Citation
Agriculture, Ecosystems and Environment, 2022, v. 333 How to Cite?
Abstract

Farmland birds are declining globally due to anthropogenic activities, with particularly few studies in Asian agricultural landscapes. Various studies have examined the impacts of landscape heterogeneity on farmland bird composition, but few have considered seasonal changes in bird diversity and examined functional feeding guild assemblages. Here, we disentangle the impact of seasonal variation (summer, monsoon, and winter), cropping practice (mixed crop, monocultural-crop, and fallow land), crop type (rice, wheat, maize, sugarcane, and other crops), landscape heterogeneity, and the number of houses and trees on the richness and abundance of farmland birds and their feeding guilds conducted within human-dominated agricultural landscapes of lowland Nepal. We established 116 transects (farmland = 100, forest = 8, and river = 8), and each transect was visited nine times from April 2018 to December 2019, with forests and river transect to test the dissimilarities in bird composition between those habitats and farmlands. We recorded 201 bird species in farmland, 133 in the forest, and 131 in river habitats. Bird composition on farmlands showed more dissimilarity with forest than river transects. We recorded nine globally, and 26 nationally threatened birds in farmlands. Seasonal variation and cropping practice significantly influenced the richness of all farmland birds and resident birds only, whereas species abundances vary by season only. We recorded higher species richness in the winter season and mixed crop fields but greater abundance in the monsoon and monoculture crop fields. Farmland bird richness increased with increasing tree numbers but decreased with increasing house numbers. Sugarcane fields had the highest bird richness within crop species, whereas rice fields had the greatest abundance. Seasons and cropping practice also shaped the assemblages of feeding guilds differently. In the context of increasing crop intensification globally, our study suggests that the governments in this region should encourage farmers to cultivate mixed crops and simultaneously restrict the urbanization of farmlands to protect bird diversity. Seasonality should be factored into analyses aimed at understanding bird diversity in agricultural landscapes.


Persistent Identifierhttp://hdl.handle.net/10722/333808
ISSN
2023 Impact Factor: 6.0
2023 SCImago Journal Rankings: 1.744
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorKatuwal, H-
dc.contributor.authorRai, J-
dc.contributor.authorTomlinson, K-
dc.contributor.authorRimal, B-
dc.contributor.authorSharma, H-
dc.contributor.authorBaral, H-
dc.contributor.authorHughes, A-
dc.contributor.authorQuan, R-
dc.date.accessioned2023-10-06T08:39:15Z-
dc.date.available2023-10-06T08:39:15Z-
dc.date.issued2022-08-01-
dc.identifier.citationAgriculture, Ecosystems and Environment, 2022, v. 333-
dc.identifier.issn0167-8809-
dc.identifier.urihttp://hdl.handle.net/10722/333808-
dc.description.abstract<p>Farmland birds are declining globally due to anthropogenic activities, with particularly few studies in Asian agricultural landscapes. Various studies have examined the impacts of landscape heterogeneity on farmland bird composition, but few have considered seasonal changes in bird diversity and examined functional feeding guild assemblages. Here, we disentangle the impact of seasonal variation (summer, monsoon, and winter), cropping practice (mixed crop, monocultural-crop, and fallow land), crop type (rice, wheat, maize, sugarcane, and other crops), landscape heterogeneity, and the number of houses and trees on the richness and abundance of farmland birds and their feeding guilds conducted within human-dominated agricultural landscapes of lowland Nepal. We established 116 transects (farmland = 100, forest = 8, and river = 8), and each transect was visited nine times from April 2018 to December 2019, with forests and river transect to test the dissimilarities in bird composition between those habitats and farmlands. We recorded 201 bird species in farmland, 133 in the forest, and 131 in river habitats. Bird composition on farmlands showed more dissimilarity with forest than river transects. We recorded nine globally, and 26 nationally threatened birds in farmlands. Seasonal variation and cropping practice significantly influenced the richness of all farmland birds and resident birds only, whereas species abundances vary by season only. We recorded higher species richness in the winter season and mixed crop fields but greater abundance in the monsoon and monoculture crop fields. Farmland bird richness increased with increasing tree numbers but decreased with increasing house numbers. Sugarcane fields had the highest bird richness within crop species, whereas rice fields had the greatest abundance. Seasons and cropping practice also shaped the assemblages of feeding guilds differently. In the context of increasing crop intensification globally, our study suggests that the governments in this region should encourage farmers to cultivate mixed crops and simultaneously restrict the urbanization of farmlands to protect bird diversity. Seasonality should be factored into analyses aimed at understanding bird diversity in agricultural landscapes.<br></p>-
dc.languageeng-
dc.publisherElsevier-
dc.relation.ispartofAgriculture, Ecosystems and Environment-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectAgricultural land-
dc.subjectAvian conservation-
dc.subjectAvian diversity-
dc.subjectFarmland birds-
dc.subjectFeeding guild-
dc.subjectGrassland bird-
dc.subjectMixed crop-
dc.subjectSouth Asia-
dc.subjectSugarcane field-
dc.titleSeasonal variation and crop diversity shape the composition of bird communities in agricultural landscapes in Nepal-
dc.typeArticle-
dc.identifier.doi10.1016/j.agee.2022.107973-
dc.identifier.scopuseid_2-s2.0-85127215509-
dc.identifier.volume333-
dc.identifier.isiWOS:000797935200005-
dc.identifier.issnl0167-8809-

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