Can landscape level semi-natural habitat compensate for pollinator biodiversity loss due to farmland consolidation?

Shi, Xiaoyu; Xiao, Haijun; Luo, Shudong; Hodgson, Jenny A.; Bianchi, Felix J.J.A.; He, Hong‐Ping; Werf, Wopke Van der; Zou, Yi

doi:10.1016/j.agee.2021.107519

Cited by 35 publications

(44 citation statements)

References 44 publications

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“…Furthermore, we found that there was lower pollinator diversity in farms that were more intensely managed (i.e., used exclusively chemicals or used some chemicals to farm). Our finding is in line with existing studies that have found that intensive farming practices in general, not only chemical usage, contribute to lower pollinator diversity, particularly in tropical environments [11,[56][57][58][59]. High pollinator diversity has been shown to improve crop productivity in smallholder farms, increase coffee fruit set and improve the amount and frequency of pollination services [50,[60][61][62].…”

Section: Discussionsupporting

confidence: 91%

“…Finally, although we observed large variation in pollinator diversity and visitation time between farms that used chemicals and those that practiced organic methods, pollinator conservation has to be applied at a landscape-scale if it is to protect pollinator species in the long-term [40,58]. Pollinators can be affected by chemical pesticides used in areas that far exceed a particular area of production, both spatially and temporally.…”

Section: Discussionmentioning

confidence: 89%

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Flower Visitation Time and Number of Visitor Species Are Reduced by the Use of Agrochemicals in Coffee Home Gardens

Manson

Nekaris

Hedger³

et al. 2022

Agronomy

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Pollination services, from both wild and managed populations of insect pollinators, have degraded as a result of agricultural intensification. Whilst 75% of economically important crops depend on insect pollinators for cultivation, 40% of insect pollinator species are threatened with extinction. Pollination services must be preserved if there is to be enough food for a global population whose demand is expected to double, if not triple, by 2050. Pollinator diversity and pollinator efficiency have been found to increase as a result of wildlife-friendly farming practices (i.e., natural chemicals and fertilizers and agroforestry). We evaluated the presence of insect pollinators in 42 coffee home gardens in West Java, Indonesia. Via generalized linear mixed models, we found that number of visitor species (β = 0.418 ± SE 0.194, p = 0.031) and visitation time (β = 0.845 ± SE 0.308, p = 0.006) decreased as farms were more intensely managed, (i.e., used chemical pesticides), compared to fields using organic practices. As knowledge of pollination services is widespread amongst smallholder farmers in Indonesia and beyond due to the long-held tradition of beekeeping, these results will add to their existing knowledge and empower farmers to enhance resources for pollinator species through agroforestry and natural pest management. Although we found significant differences in pollination services provided in intensely managed and wildlife-friendly farms, chemical use can affect farms far beyond a particular area of production. Therefore, pollinator conservation must be applied at a landscape level and involve all stakeholders, including farmers, when making effective policies.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 89%

Flower Visitation Time and Number of Visitor Species Are Reduced by the Use of Agrochemicals in Coffee Home Gardens

Manson

Nekaris

Hedger³

et al. 2022

Agronomy

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“…Both wild pollinator assemblages and wild bee assemblages in consolidated and traditional farmland were surprisingly similar, which contradicts our hypothesis as well as previous studies (Wilson et al, 2020). Although the negative impact of farmland consolidation on wild pollinator diversity has been reported from the same area (Shi et al, 2021), the farmland consolidation has not resulted in a significant difference in the composition of the assemblages at rapeseed fields with regards to their dominant species, but also to the species pool containing less dominant species. A possible reason for this lack of differentiation relates to our study sites all being located in landscapes with relatively high semi‐natural habitat coverage.…”

Section: Discussionmentioning

confidence: 78%

“…The selected, relatively large scale can also guarantee that all land use types were representatively covered in sites that were not perfectly centred on the investigated landscape. Forest was included as a semi‐natural habitat since it has been reported to benefit wild bee communities (Papanikolaou et al, 2017; Rivers‐Moore et al, 2020, but see also Wu et al, 2019) and had been included in previous studies at our research sites (Shi et al, 2021; Zou et al, 2017). In 2020, we additionally assessed the current land use using drone‐generated (DJI® Mavic Pro) imagery within a 1000 m radius centred on our study fields.…”

Section: Methodsmentioning

confidence: 99%

“…These projects therefore greatly simplify and homogenize the agricultural landscape. Our recent studies of smallholder farmland in Jiangxi province found that this farmland consolidation resulted in a reduced pollinator richness when compared to traditional agricultural areas (Shi et al, 2021), indicating a negative effect especially from the reduction of interspersed semi‐natural habitat patches in consolidated farmland on wild pollinator diversity. However, it remains unclear how farmland consolidation specifically affects the pollinator community composition and functional trait spectra such as body size and dominant nesting location.…”

Section: Introductionmentioning

confidence: 98%

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Effects of farmland consolidation in southern China on wild bee species composition, nesting location and body size variations

Shi

Axmacher

Chong

et al. 2022

Agri and Forest Entomology

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1. Traditional smallholding-dominated agricultural landscapes in Southern China are increasingly homogenized and consolidated, resulting in large mono-cropped fields and impoverished pollinator communities. The exact impact of this farmland consolidation on composition and functional traits of wild bee communities remains poorly understood.2. We studied these communities and functional traits in oilseed rape fields embedded in 18 agricultural landscapes located in Jiangxi Province, China, with 11 sites representing traditional (pre-consolidation) and the remaining 7 sites consolidated agricultural landscapes.3. The composition of wild bee assemblages was not differentiated into consolidated and traditional farmland communities. The mean body size of wild bee species similarly did not shows significant differences between consolidated and traditional farmland. The mean intraspecific body size for a dominant species, Lasioglossum proximatum, was larger in consolidated than traditional farmland, while individuals of co-dominant Eucera floralia showed no such differentiation. In consolidated farmland, the proportion of semi-natural habitat was positively linked to the abundance-based average interspecific body size of wild bee species. For abundance-based calculations, the proportion of aboveground nesting bee species was lower in consolidated landscapes than in traditional ones. 4. Our study suggests that farmland consolidation might affect intraspecific composition, particularly in abundant small-bodied species. Above-ground nesting bees may require specific management interventions in consolidated agricultural landscapes to promote their persistence, which could take the form of semi-natural habitat patches introduced to fields that can also benefit the pollinator community more widely.

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Land consolidation, cropland use, and vegetation productivity

Demirdogen

2024

Agribusiness

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Land consolidation represents a valuable tool for enhancing agricultural productivity. However, there is a notable gap in the literature, with few studies effectively estimating the impact of land consolidation on microlevel crop changes. In our study, we estimated how land consolidation affects cropland use and vegetation productivity in Turkey, specifically examining wheat and corn. To analyze microlevel datasets from various villages, we applied multiple difference‐in‐differences approaches. Our results show that land consolidation affects farmers' cropland usage, particularly transitioning from wheat to corn. Land consolidation also leads to increased yields for both wheat and corn, although these benefits are not long‐lasting and diminish within a few years. Thus, our findings provide valuable insights for land‐use policy and planning, highlighting the critical role of land consolidation in determining farmers' cropland uses and its effect on overall productivity [EconLit Citations: Q12, Q15, Q18].

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Can landscape level semi-natural habitat compensate for pollinator biodiversity loss due to farmland consolidation?

Cited by 35 publications

References 44 publications

Flower Visitation Time and Number of Visitor Species Are Reduced by the Use of Agrochemicals in Coffee Home Gardens

Flower Visitation Time and Number of Visitor Species Are Reduced by the Use of Agrochemicals in Coffee Home Gardens

Effects of farmland consolidation in southern China on wild bee species composition, nesting location and body size variations

Land consolidation, cropland use, and vegetation productivity

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