Urbanization Affects Plant Flowering Phenology and Pollinator Community: Effects of Water Availability and Land Cover

Neil, Kaesha; Wu, Jianguo; Bang, Christofer; Faeth, Stanley H.

doi:10.1201/b18713-12

Cited by 4 publications

(4 citation statements)

References 42 publications

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“…Analogously, in arid regions where native plant growth is constrained by seasonal rainfall, the growing season in agricultural and urban land use is extended by irrigating crops and ornamental plants (Buyantuyev & Wu, ; Leong & Roderick, ). In these systems, researchers have observed corresponding temporal changes in abundance and richness of associated insect communities (Gotlieb, Hollender, & Mandelik, ; Leong & Roderick, ; Neil, Wu, Bang, & Faeth, ).…”

Section: Discussionmentioning

confidence: 99%

Forest bees are replaced in agricultural and urban landscapes by native species with different phenologies and life‐history traits

Harrison

Gibbs

Winfree

2017

Global Change Biology

122

121

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Anthropogenic landscapes are associated with biodiversity loss and large shifts in species composition and traits. These changes predict the identities of winners and losers of future global change, and also reveal which environmental variables drive a taxon's response to land use change. We explored how the biodiversity of native bee species changes across forested, agricultural, and urban landscapes. We collected bee community data from 36 sites across a 75,000 km 2 region, and analyzed bee abundance, species richness, composition, and life-history traits. Season-long bee abundance and richness were not detectably different between natural and anthropogenic landscapes, but community phenologies differed strongly, with an early spring peak followed by decline in forests, and a more extended summer sea-

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Section: Discussionmentioning

confidence: 99%

Forest bees are replaced in agricultural and urban landscapes by native species with different phenologies and life‐history traits

Harrison

Gibbs

Winfree

2017

Global Change Biology

122

121

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“…Covarying climatic factors may be controlled experimentally, as done in a study of potted brittlebush ( Encelia farinosa ) that found urban‐located plants bloomed later and longer than desert‐located plants regardless of watering treatment (Neil et al . ). Another approach is to use historical records to validate space‐for‐time substitution study designs for studying climate change.…”

Section: Urban Warming and Climate Changementioning

confidence: 97%

Urban drivers of plant‐pollinator interactions

2015

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Summary1. Plant-pollinator interactions are affected by global change, with largely negative impacts on pollination and plant reproduction. Urban areas provide a unique and productive study system for understanding the impacts of many global change drivers on plant-pollinator interactions. 2. We review the mechanistic pathways through which urban drivers alter plant-pollinator interactions. The literature on urban drivers of plant-pollinator interactions is small but growing and has already produced exciting insights about how population processes or pollinator behaviour interacts with landscape urban drivers to affect pollination outcomes. 3. Habitat loss and fragmentation can change flower visitation rates and pollination success through changes in pollinator foraging behaviour or through population-level effects on pollinators. Urban environments, where impermeable surface provides an inhospitable matrix, may allow researchers to identify habitat fragments more clearly than in many other environments. 4. Recent studies have found that non-native plants are not differently preferred by pollinators relative to native plants, therefore removing the basis for expecting pollinator-mediated competition between native and non-native plants in urban habitats. However, non-native species together with managed vegetation may have powerful effects in urban habitats via changes in community-level plant phenology and consequent changes in pollinator phenology. 5. The current level of climate warming has not caused plants and pollinators to become detectably temporally separated, although at the same time, diversity among species' phenological responses could buffer plant-pollinator interactions from climate variation. Due to the urban warming effect, cities provide a promising system for better understanding the warming effects on plant-pollinator interactions. 6. Environmental contaminants such as soil nitrogen and heavy metal pollution have been examined with respect to plant-pollinator interactions in small-scale, mechanistic studies. The extent to which environmental contaminants drive plant-pollinator interactions in actual urban landscapes is, however, currently unknown. 7. Important knowledge gaps that require research attention include understanding the consequences of plant and pollinator trait filtering on plant-pollinator interactions, and expanding the literature to include underrepresented biomes and pollinator taxa.

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“…Similarly, in arid regions, management of urban flora can extend plant bloom, with benefits to pollinators (Neil et al. ).…”

Section: Introductionmentioning

confidence: 99%

The relative performance of sampling methods for native bees: an empirical test and review of the literature

et al. 2020

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Many bee species are declining globally, but to detect trends and monitor bee assemblages, robust sampling methods are required. Numerous sampling methods are used, but a critical review of their relative effectiveness is lacking. Moreover, evidence suggests the relative effectiveness of sampling methods depends on habitat, yet efficacy in urban areas has yet to be evaluated. This study compared the bee community documented using observational records, targeted netting, mobile gardens, pan traps (blue and yellow), vane traps (blue and yellow), and trap‐nests. The comparative surveys of native bees and honeybees were undertaken in an urbanized region of the southwest Australian biodiversity hot spot. The outcomes of the study were then compared to a synthesis based on a comprehensive literature review of studies where two or more bee sampling methods were conducted. Observational records far exceeded all other methods in terms of abundance of bees recorded, but were unable to distinguish finer taxonomic levels. Of methods that captured individuals, thereby permitting taxonomic identification, targeted sweep netting vastly outperformed the passive sampling methods, yielding a total of 1324 individuals, representing 131 taxonomic units—even when deployed over a shorter duration. The relative effectiveness of each method differed according to taxon. From the analysis of the literature, there was high variability in relative effectiveness of methods, but targeted sweep netting and blue vane traps tended to be most effective, in accordance with results from this study. However, results from the present study differed from most previous studies in the extremely low catch rates in pan traps. Species using trap‐nests represented only a subset of all potential cavity‐nesters, and their relative abundances in the trap‐nests differed from those in the field. Mobile gardens were relatively ineffective at attracting bees. For urbanized habitat within this biodiversity hot spot, targeted sweep netting is indispensable for obtaining a comprehensive indication of native bee assemblages; passive sampling methods alone recorded only a small fraction of the native bee community. Overall, a combination of methods should be used for sampling bee communities, as each has their own biases, and certain taxa were well represented in some methods, but poorly represented in others.

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Urbanization Affects Plant Flowering Phenology and Pollinator Community: Effects of Water Availability and Land Cover

Cited by 4 publications

References 42 publications

Forest bees are replaced in agricultural and urban landscapes by native species with different phenologies and life‐history traits

Forest bees are replaced in agricultural and urban landscapes by native species with different phenologies and life‐history traits

Urban drivers of plant‐pollinator interactions

The relative performance of sampling methods for native bees: an empirical test and review of the literature

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