Effects of Wetland Presence and Upland Land Use on Wild Hymenopteran and Dipteran Pollinators in the Rainwater Basin of Nebraska, USA

Begosh, Angela; Smith, Loren M.; Park, Cynthia N.; McMurry, Scott T.; LaGrange, Ted

doi:10.1007/s13157-019-01244-w

Cited by 8 publications

(9 citation statements)

References 62 publications

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“…This pattern held true for all bees combined as well as for both below-and above-ground nesting bees. Although these results are consistent with past work that also trapped fewer pollinator species in wetlands than in upland habitats (Begosh et al, 2020), other studies report a positive effect of wetlands on the abundance and richness of bees (Evans et al, 2018). Wetlands may be perceived to be more important when compared to highly disturbed habitats, such as row crops, than when compared to other semi-natural areas.…”

Section: Discussionsupporting

confidence: 90%

Spatiotemporal patterns of forest pollinator diversity across the southeastern United States

Ulyshen,

Adams,

Adams

et al. 2024

Preprint

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Efforts to understand how pollinating insect diversity is distributed across large geographic areas are rare despite the importance of such work for conserving regional diversity. We sampled bees (Hymenoptera: Apoidea), hover flies (Diptera: Syrphidae), and butterflies (Lepidoptera) on nineteen National Forests across the southeastern U.S. and related their diversity to ecoregion, landscape context, canopy openness, and forest composition. Bee richness was negatively correlated with both the amount of conifer forest and the extent of wetlands in the surrounding landscape but was positively correlated with canopy openness. Hover flies and butterflies were less sensitive to landscape context and stand conditions. Pollinator communities differed considerably among ecoregions, with those of the Central Appalachian and Coastal Plain ecoregions being particularly distinct. Bee richness and abundance peaked two months earlier in Central Appalachia than in the Coastal Plain and Southeastern Mixed Forest ecoregions. Our findings suggest that hardwood forests may play a particularly important role in supporting forest-associated bees in the southeastern U.S. and that efforts to create more open forest conditions may benefit this fauna.

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Section: Discussionsupporting

confidence: 90%

Spatiotemporal patterns of forest pollinator diversity across the southeastern United States

Ulyshen,

Adams,

Adams

et al. 2024

Preprint

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“…Stephenson et al ( 2018 ) also reported that wetland-dependent bees were less abundant in small wetlands based on a multi-site pan trap survey. Begosh et al ( 2020 ) reported that the visitation frequency of flies and bees in playa wetlands of Nebraska varied depending on the surrounding environment such as crop lands and natural and restored grasslands. These results suggest that wetland-dependent pollinators are not necessarily dominant in wetlands, and their dominance may depend on the wetland area and the characteristics of the surrounding environment.…”

Section: Discussionmentioning

confidence: 99%

“…Taki et al ( 2011 ) reported that the abundance of pollinator bees in crop fields was higher when the surrounding area was natural forest than plantation. Identifying key pollinators for plant communities in wetlands and their associated habitats (both wetland and non-wetland-dependent) is essential for developing effective conservation strategies for wetland plant communities (Begosh et al 2020 ; Kato and Miura 1996 ; Mahoro et al 2008 ). However, data on pollinator communities in small natural wetlands are still limited.…”

Section: Introductionmentioning

confidence: 99%

Dominance of non-wetland-dependent pollinators in a plant community in a small natural wetland in Shimane, Japan

Watazu,

Hiraiwa,

Inoue

et al. 2024

J Plant Res

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Many wetland plants rely on insects for pollination. However, studies examining pollinator communities in wetlands remain limited. Some studies conducted in large wetlands (> 10 ha) have suggested that wetland-dependent flies, which spend their larval stage in aquatic and semi-aquatic habitats, dominate as pollinators. However, smaller wetlands surrounded by secondary forests are more prevalent in Japan, in which pollinators from the surrounding environment might be important. Additionally, information regarding floral traits that attract specific pollinator groups in wetland communities is scarce. Therefore, this study aimed to understand the characteristics of insect pollinators in a small natural wetland (2.5 ha) in Japan. We examined the major pollinator groups visiting 34 plant species and explored the relationship between the flower visitation frequency of each pollinator group and floral traits. Overall, flies were the most dominant pollinators (42%), followed by bees and wasps (33%). Cluster analysis indicated that fly-dominated plants were the most abundant among 14 of the 34 target plant species. However, 85% of the hoverflies, the most abundant flies, and 82% of the bees were non-wetland-dependent species, suggesting that these terrestrial species likely originated from the surrounding environment. Therefore, pollinators from the surrounding environment would be important in small natural wetlands. Flies tend to visit open and white/yellow flowers, whereas bees tended to visit tube-shaped flowers, as in forest and grassland ecosystems. The dominance of flies in small wetlands would be due to the dominance of flowers preferred by flies (e.g., yellow/white flowers) rather than because of their larval habitats.

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“…We include the competition factor β j in the density‐dependent population growth function of Maynard Smith and Slatkin (1973) as a direct impact on the growth rate R j (for resource competition) and a direct impact on the density dependence (for nesting site competition) (compare Begosh et al, 2020; Jeltsch et al, 2011). Competition‐dependent resource uptake (res uptake ) (Equation ) is first calculated for each cell within the foraging range of the specific population, and afterwards, the average resource uptake over the foraging range is calculated.…”

Section: Methodsmentioning

confidence: 99%

“…and a direct impact on the density dependence (for nesting site competition) (compare Begosh et al, 2020;Jeltsch et al, 2011).…”

Section: Ta B L E 1 (Continued)mentioning

confidence: 99%

Agricultural buffer zone thresholds to safeguard functional bee diversity: Insights from a community modeling approach

Reeg

Strigl

Jeltsch

2022

Ecology and Evolution

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Wild bee species are important pollinators in agricultural landscapes. However, population decline was reported over the last decades and is still ongoing. While agricultural intensification is a major driver of the rapid loss of pollinating species, transition zones between arable fields and forest or grassland patches, i.e., agricultural buffer zones, are frequently mentioned as suitable mitigation measures to support wild bee populations and other pollinator species. Despite the reported general positive effect, it remains unclear which amount of buffer zones is needed to ensure a sustainable and permanent impact for enhancing bee diversity and abundance. To address this question at a pollinator community level, we implemented a process‐based, spatially explicit simulation model of functional bee diversity dynamics in an agricultural landscape. More specifically, we introduced a variable amount of agricultural buffer zones (ABZs) at the transition of arable to grassland, or arable to forest patches to analyze the impact on bee functional diversity and functional richness. We focused our study on solitary bees in a typical agricultural area in the Northeast of Germany. Our results showed positive effects with at least 25% of virtually implemented agricultural buffer zones. However, higher amounts of ABZs of at least 75% should be considered to ensure a sufficient increase in Shannon diversity and decrease in quasi‐extinction risks. These high amounts of ABZs represent effective conservation measures to safeguard the stability of pollination services provided by solitary bee species. As the model structure can be easily adapted to other mobile species in agricultural landscapes, our community approach offers the chance to compare the effectiveness of conservation measures also for other pollinator communities in future.

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Effects of Wetland Presence and Upland Land Use on Wild Hymenopteran and Dipteran Pollinators in the Rainwater Basin of Nebraska, USA

Cited by 8 publications

References 62 publications

Spatiotemporal patterns of forest pollinator diversity across the southeastern United States

Spatiotemporal patterns of forest pollinator diversity across the southeastern United States

Dominance of non-wetland-dependent pollinators in a plant community in a small natural wetland in Shimane, Japan

Agricultural buffer zone thresholds to safeguard functional bee diversity: Insights from a community modeling approach

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