Pollinator communities vary with vegetation structure and time since management within regenerating timber harvests of the Central Appalachian Mountains

Mathis, Codey L.; McNeil, Darin J.; Lee, Monica R.; Grozinger, Christina M.; King, David I.; Otto, Clint R. V.; Larkin, Jeffery L.

doi:10.1016/j.foreco.2021.119373

Cited by 25 publications

(29 citation statements)

References 90 publications

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“…However, in our study, early successional habitats were sampled 1–2 years after the measure, while the above‐mentioned study sampled after 4–8 years. Therefore, communities may be especially reactive in the early years after the measure, before vegetation height and the regeneration of woody plants increases, altering resource availability on the sites (Mathis et al, 2021; Rivers & Betts, 2021). For landscape variables, a higher canopy openness and landscape heterogeneity changed the species composition.…”

Section: Discussionmentioning

confidence: 99%

Open forest successional stages and landscape heterogeneity promote wild bee diversity in temperate forests

Eckerter

Braunisch

Buse

et al. 2022

Conservat Sci and Prac

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Recent studies have emphasized forests as crucial habitat for wild bees. In Europe, most forests are managed following the principles of close‐to‐nature silviculture, which combine timber production and nature conservation. However, open late and early successional stages within these forests are largely missing, which could be important for wild bees. This highlights that close‐to‐nature silviculture alone might not be sufficient to conserve bees within temperate forests. Open structures such as canopy gaps and road verges in forests could improve habitat for bees. To provide management recommendations for wild bee conservation in temperate forests, we analyzed how components of bee beta diversity varied between forest management types and tested how open structures, namely clear‐cuts, canopy gaps, and forest road verges influenced bee abundance, richness, and diversity. In addition, we analyzed the abundance and percent of red‐listed bee species at different scales. Bees were sampled using 90 pan traps on 45 (1 ha) plots in 2019 and 2020 in the Black Forest, Germany. Plots were selected in 15 triplets each consisting of three management types related to different successional stages: unmanaged, close‐to‐nature, and small clear‐cut. Beta diversity was not consistently nested highlighting the importance of different management and successional stages within the landscape to support bees in forests. Abundance, species richness, and Shannon diversity of bees were highest on clear‐cuts, compared to unmanaged‐ and close‐to‐nature plots. At landscape scale, wild bee abundance increased with canopy openness while wild bee diversity increased with landscape heterogeneity. Abundance‐ and percent of red‐listed bee species increased with the length of forest road verges. We advocate creating habitats at local scales which offer flowering and nesting resources by providing canopy gaps. At landscape scale, heterogeneity created through different forest successional stages is needed to conserve the entire community of wild bees.

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Section: Discussionmentioning

confidence: 99%

Open forest successional stages and landscape heterogeneity promote wild bee diversity in temperate forests

Eckerter

Braunisch

Buse

et al. 2022

Conservat Sci and Prac

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“…Flowers are typically rare in the shrub and herb layers beneath closed-canopy forests, being much more common in early-successional stands, areas of canopy disturbance (e.g. treefall gaps) (Ulyshen et al, 2022a), or neighbouring open habitats (Mathis et al, 2021(Mathis et al, , 2022. This is especially true in conifer-dominated forests that develop closed canopies (Wray & Elle, 2015).…”

Section: Forests Provide Unique Resources To Pollinatorsmentioning

confidence: 99%

Forests are critically important to global pollinator diversity and enhance pollination in adjacent crops

et al. 2023

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Although the importance of natural habitats to pollinator diversity is widely recognized, the value of forests to pollinating insects has been largely overlooked in many parts of the world. In this review, we (i) establish the importance of forests to global pollinator diversity, (ii) explore the relationship between forest cover and pollinator diversity in mixed‐use landscapes, and (iii) highlight the contributions of forest‐associated pollinators to pollination in adjacent crops. The literature shows unambiguously that native forests support a large number of forest‐dependent species and are thus critically important to global pollinator diversity. Many pollinator taxa require or benefit greatly from resources that are restricted to forests, such as floral resources provided by forest plants (including wind‐pollinated trees), dead wood for nesting, tree resins, and various non‐floral sugar sources (e.g. honeydew). Although landscape‐scale studies generally support the conclusion that forests enhance pollinator diversity, findings are often complicated by spatial scale, focal taxa, landscape context, temporal context, forest type, disturbance history, and external stressors. While some forest loss can be beneficial to pollinators by enhancing habitat complementarity, too much can result in the near‐elimination of forest‐associated species. There is strong evidence from studies of multiple crop types that forest cover can substantially increase yields in adjacent habitats, at least within the foraging ranges of the pollinators involved. The literature also suggests that forests may have enhanced importance to pollinators in the future given their role in mitigating the negative effects of pesticides and climate change. Many questions remain about the amount and configuration of forest cover required to promote the diversity of forest‐associated pollinators and their services within forests and in neighbouring habitats. However, it is clear from the current body of knowledge that any effort to preserve native woody habitats, including the protection of individual trees, will benefit pollinating insects and help maintain the critical services they provide.

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“…Likewise, increased canopy openness markedly changes the understory and herbaceous layers (e.g., Dietz et al, 2020). This promotes floral resources and in turn affects some guilds of canopy-dwelling species, relying on below-canopy resources, such as pollinators (Davis et al, 2020;Mathis et al, 2021; but see Urban-Mead et al, 2021).…”

Section: Decline-driven Modifications In Canopy Habitats and Cascading Effects On Arthropod Communitiesmentioning

confidence: 99%

Climate Change Alters Temperate Forest Canopies and Indirectly Reshapes Arthropod Communities

Sallé

Cours

Souchu

et al. 2021

Front. For. Glob. Change

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Global change challenges the adaptive potential of forests. Large-scale alterations of forest canopies have been reported across Europe, and further modifications are expected in response to the predicted changes in drought and windstorm regimes. Since forest canopies are dynamic interfaces between atmosphere and land surface, communities of canopy-dwelling insects are at the forefront of major changes in response to both direct and indirect effects of climate change. First, we briefly introduce the factors shaping arthropod communities in the canopy of temperate forests. Second, we cover the significant impacts of a forest decline on canopy structure and functioning, and more specifically its contrasted effects on insect microhabitats, trophic resources and forest microclimates. Deleterious effects may be expected for several guilds of leaf-dwelling insects. Nonetheless, a forest decline could also lead to transient or long-lasting resource pulses for other canopy-dwelling guilds, especially saproxylic species depending on deadwood substrates and tree-related microhabitats. The novel microclimates may also become more favorable for some particular groups of insects. We pinpoint current knowledge gaps and the technological locks that should be undone to improve our understanding of the canopy biotope and biodiversity in temperate forests. We highlight the need for integrative approaches to reveal the mechanisms at play. We call for cross-scale studies and long-term collaborative research efforts, involving different disciplines such as community and disturbance ecology, plant and insect ecophysiology, and thermal ecology, to better anticipate ongoing functional and conservation issues in temperate forest ecosystems.

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Pollinator communities vary with vegetation structure and time since management within regenerating timber harvests of the Central Appalachian Mountains

Cited by 25 publications

References 90 publications

Open forest successional stages and landscape heterogeneity promote wild bee diversity in temperate forests

Open forest successional stages and landscape heterogeneity promote wild bee diversity in temperate forests

Forests are critically important to global pollinator diversity and enhance pollination in adjacent crops

Climate Change Alters Temperate Forest Canopies and Indirectly Reshapes Arthropod Communities

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