Insect abundance in managed forests benefits from multi-layered vegetation

Knuff, Anna K.; Staab, Michael; Frey, Julian; Dormann, Carsten F.; Asbeck, Thomas; Klein, Alexandra‐Maria

doi:10.1016/j.baae.2020.09.002

Cited by 42 publications

(29 citation statements)

References 68 publications

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“…Our study demonstrates that species richness per se generally supports a high stand structural complexity with all its beneficial consequences. Tree species richness mainly promotes vertical heterogeneity, which supports ecosystem functions and services such as timber production or carbon sequestration (Guillemot et al., 2020; Williams et al., 2017; Zemp, Ehbrecht, et al., 2019), but also positively affects the species diversity or abundance of higher trophic levels (Knuff et al., 2020; Schuldt et al., 2019) as well as the robustness of multitrophic interactions (Fornoff et al., 2019). Afforestation projects should therefore use a broad range of the tree species native to a respective site in order to promote both the functioning of the newly established forests (including related services) and the biodiversity they potentially host.…”

Section: Discussionmentioning

confidence: 99%

Tree species richness promotes an early increase of stand structural complexity in young subtropical plantations

Perles-Garcia

Kunz

Fichtner

et al. 2021

Journal of Applied Ecology

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Forest plantations are established globally to provide multiple ecosystem services such as the production of timber, fuel and pulpwood (FAO, 2010). Specifically, global afforestation and reforestation efforts are among the major nature-based solutions employed to combat the adverse impacts of climate change. Currently, 168 Mha of degraded and deforested land, mainly located in the tropics and subtropics, has been pledged as restoration areas under the 'Bonn Challenge' (IUCN, 2020). A large part of this area is intended for

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Section: Discussionmentioning

confidence: 99%

Tree species richness promotes an early increase of stand structural complexity in young subtropical plantations

Perles-Garcia

Kunz

Fichtner

et al. 2021

Journal of Applied Ecology

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“…Arthropods were stored in 75% ethanol and sorted to order level (with Hemiptera being further separated into Auchenorrhyncha, Sternorrhyncha and Heteroptera). Larvae and non-flying taxa such as spiders were excluded from the dataset 68 .…”

Section: Methodsmentioning

confidence: 99%

Biodiversity response to forest management intensity, carbon stocks and net primary production in temperate montane forests

Asbeck

Sabatini

Augustynczik

et al. 2021

Sci Rep

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Managed forests are a key component of strategies aimed at tackling the climate and biodiversity crises. Tapping this potential requires a better understanding of the complex, simultaneous effects of forest management on biodiversity, carbon stocks and productivity. Here, we used data of 135 one-hectare plots from southwestern Germany to disentangle the relative influence of gradients of management intensity, carbon stocks and forest productivity on different components of forest biodiversity (birds, bats, insects, plants) and tree-related microhabitats. We tested whether the composition of taxonomic groups varies gradually or abruptly along these gradients. The richness of taxonomic groups was rather insensitive to management intensity, carbon stocks and forest productivity. Despite the low explanatory power of the main predictor variables, forest management had the greatest relative influence on richness of insects and tree-related microhabitats, while carbon stocks influenced richness of bats, birds, vascular plants and pooled taxa. Species composition changed relatively abruptly along the management intensity gradient, while changes along carbon and productivity gradients were more gradual. We conclude that moderate increases in forest management intensity and carbon stocks, within the range of variation observed in our study system, might be compatible with biodiversity and climate mitigation objectives in managed forests.

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“…Therefore, quality is nearly impossible to define for a whole community consisting of different species with different needs (Dennis et al, 2014). Nevertheless, for terrestrial insectsespecially pollinators and herbivores, which have a long history of co-evolution with plants (Macior, 1971) -a high quality site might be generally marked by high plant species richness and high structural complexity of its vegetation (Chisté et al, 2016;Alison et al, 2017;Knuff et al, 2020). Looking for example at forest habitats, a near-natural forest structure with unevenly aged trees, a substantial understory layer, and a certain amount of deadwood might for many species be of higher quality than evenly aged, dense, young forest stands which are planted for a maximum gain in timber production (Thorn et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Qualitative and Quantitative Loss of Habitat at Different Spatial Scales Affects Functional Moth Diversity

2021

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Land use change has led to large-scale insect decline, threatening ecosystem resilience through reduced functional diversity. Even in nature reserves, losses in insect diversity have been detected. Hereby, changes in local habitat quality and landscape-scale habitat quantity can play a role driving functional diversity toward erosion. Our aim was to analyze how local and landscape-scale factors simultaneously affect functional insect diversity. Therefore, we sampled moths in two Italian coastal forest reserves at 60 sites. Our focus was on functional richness, redundancy and niche occupation, being important for ecosystem resilience, following the insurance framework. Ecological information about 387 species and 14 traits was used to analyze functional diversity. Twenty-five functional groups were recognized and used to estimate niche occupation and redundancy. Fourteen local and 12 landscape-scale factors were measured and condensed by using Principal Components Analysis. The resulting PC-axes served as predictors in linear mixed effects models. Functional richness, redundancy and niche occupation of moths were lower at sites with low habitat quality and quantity, indicating reduced ecosystem resilience. Especially landscape diversity and habitat structure, viz. a humidity-nutrient gradient, but also plant diversity, were promoting functional richness. Landscape fragmentation, indicating increased impermeability for insects, reduced local functional richness, redundancy and niche occupation. Local habitat quality and landscape-wide habitat quantity are both important for maintaining functional insect diversity inside reserves. Therefore, small and isolated nature reserves might fail in preserving biodiversity and ecosystem functions through adverse effects acting from the surrounding landscape structure and configuration.

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Insect abundance in managed forests benefits from multi-layered vegetation

Cited by 42 publications

References 68 publications

Tree species richness promotes an early increase of stand structural complexity in young subtropical plantations

Tree species richness promotes an early increase of stand structural complexity in young subtropical plantations

Biodiversity response to forest management intensity, carbon stocks and net primary production in temperate montane forests

Qualitative and Quantitative Loss of Habitat at Different Spatial Scales Affects Functional Moth Diversity

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