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248 results for “native range”

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dryad36/100

Microsatellite alleles of two species of Tetramorium ants in their native and invasive ranges

Microsatellite alleles at 16 loci, for 80 individuals of Tetramorium immigrans and 84 individuals of T. tsushimae from both their native and invasive ranges.

opencc-zeroMar 2023View details →

zenodo36/100

Seed weight of Erodium cicutarium in its native and two invaded ranges

This dataset provides seed weights of the plant Erodium cicutarium in its native range in Germany as well as two invaded ranges, California (US) and Chile. The dataset is related to the following publication: Heger, T., Nikles, G., & Jacobs, B. S. (2018). Differentiation in native as well as introduced ranges: Germination reflects mean and variance in cover of surrounding vegetation. Aob Plants, ply009-ply009. https://doi.org/10.1093/aobpla/ply009

opencc-by-4.0Mar 2023View details →

dryad36/100

Management intensity affects insect pests and natural pest control on Arabica coffee in its native range

Agroforestry systems provide opportunities to reduce the trade-off between agricultural production and biodiversity, for example by enhancing a diverse community of species potentially acting as natural pest control agents. While management of agroforestry systems is intensifying across the globe, we lack insights into the impact of management intensity on pest levels and natural pest control, especially along broad management gradients and as compared with natural forests. We assessed the impact of management intensity on major insect pests (the coffee blotch miner, the serpentine leaf miner, the coffee leaf skeletonizer, and damage by other free-feeding herbivores) and natural pest control by parasitoid wasps across sixty sites in the center of origin of Arabica coffee in southwestern Ethiopia. Within this region, coffee is growing along a broad management gradient ranging from little or no management in the natural forest to intensively managed commercial plantations. In the wet season, pest levels were largely similar in the natural forest, semi-forest, and semi-plantation systems, whereas pests reached outbreak densities in the most intensively managed plantation system. In contrast, management intensity did not significantly affect pest levels in the dry season. The insect pests differed in their seasonal dynamics, consistently declined with elevation, and were largely unaffected by shade levels. Parasitism rate of the coffee blotch miner was lower, and the parasitoid community was distinct, in the most intensively managed plantation system. Synthesis and applications: Our findings support the hypothesis that the weaker top-down control by parasitoids in the intensively managed plantation sites leads to higher pest levels, and that – at least for some pest species – there is a threshold in the effect of management intensity on pest levels and natural pest control. It is important to consider such non-linear relationships to maintain or enhance the sustainability of agroforestry systems during management intensification. Overall, our findings highlight that ecological knowledge of natural pest control can be used to intensify production to improve the livelihood of smallholders without jeopardizing natural pest control, at least up to a certain point.

opencc-zeroApr 2023View details →

dryad36/100

The timid invasion: Behavioural adjustments and range expansion in a non-native rodent

Animal behaviour can moderate or favour biological invasion processes, and the native fauna's ability to adapt. The importance of behavioural traits for colonization success remains debated, as well as the nature of behavioural traits that facilitate colonization. We investigated behavioural responses associated with risk-taking and exploration, in both non-native bank voles (Myodes glareolus, N = 225) accidentally introduced to Ireland a century ago, and in native wood mice (Apodemus sylvaticus, N = 189), that decline in numbers with vole expansion. We repeatedly sampled behavioural responses in three colonization zones: source (2 sites), expansion edge (4) and pre-arrival(2). Only source and edge zones are occupied by bank voles, for more than 80 years and 1-4 years, respectively. Individuals of both species varied consistently in risk-taking and exploration, and mice had not adjusted their behaviour to the presence of non-native voles, as their behaviour did not differ between the zones. Voles at the expansion edge were initially more risk-averse but habituated to the repeated testing situation, compared to voles that were consistently less risk-averse in the source population, indicating spatial sorting for risk-taking propensity along the expansion front We suggest that in non-native species under high predation pressure, the ability to develop timid phenotypes may thus represent a fundamental component for range expansions.

opencc-zeroJul 2023View details →

dryad36/100