Ralf Ohlemüller
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View article: Spatial dynamics and drivers of recent changes in grass and shrub cover in submontane grassland plant communities
Spatial dynamics and drivers of recent changes in grass and shrub cover in submontane grassland plant communities Open
Shrub encroachment into grassland ecosystems has been increasingly observed and documented worldwide in recent years. A grass–shrub transition can affect the diversity, abundance and functional integrity of grassland plant communities and …
View article: Do modern climatic niches distinguish extinct and extant plant genera in New Zealand?
Do modern climatic niches distinguish extinct and extant plant genera in New Zealand? Open
Past climate changes have had large impacts on modern ecological patterns. Understanding if legacies are distinguishable in the climatic niches of extant and locally extinct taxa can provide insight into the importance of climate in extinc…
View article: Global biome patterns of the Middle and Late Pleistocene
Global biome patterns of the Middle and Late Pleistocene Open
Our primary aim was to assess the hypothesis that distinctive features of the patterns of vegetation change during successive Quaternary glacial–interglacial cycles reflect climatic differences arising from forcing differences. We addresse…
View article: Differential effects of topography on the timing of the growing season in mountainous grassland ecosystems
Differential effects of topography on the timing of the growing season in mountainous grassland ecosystems Open
Grasslands in mountainous areas often show distinct responses in the timing of their growing season in relation to topographical variation. However, it is unclear which factors of topography (elevation, aspect, and slope) affect which phas…
View article: Recent trends in the timing of the growing season in New Zealand’s natural and semi-natural grasslands
Recent trends in the timing of the growing season in New Zealand’s natural and semi-natural grasslands Open
We investigate the temporal dynamics of shifts in phenological responses of a range of key stages of the growing season in New Zealand’s three indigenous grassland types over the last 16 years (2001–2016). A near-daily Normalized Differenc…
View article: Projected climatic changes lead to biome changes in areas of previously constant biome
Projected climatic changes lead to biome changes in areas of previously constant biome Open
Aim Recent studies in southern Africa identified past biome stability as an important predictor of biodiversity. We aimed to assess the extent to which past biome stability predicts present global biodiversity patterns, and the extent to w…
View article: Novel Conditions in Conservation Translocations: A Conservative-Extrapolative Strategic Framework
Novel Conditions in Conservation Translocations: A Conservative-Extrapolative Strategic Framework Open
In response to anthropogenic threats, conservation translocations are increasingly used to combat species' population and range declines. However, moving animals outside of their current distribution can mean introducing them to novel cond…
View article: Monitoring Dynamic Braided River Habitats: Applicability and Efficacy of Aerial Photogrammetry from Manned Aircraft versus Unmanned Aerial Systems
Monitoring Dynamic Braided River Habitats: Applicability and Efficacy of Aerial Photogrammetry from Manned Aircraft versus Unmanned Aerial Systems Open
Despite growing interest in using lightweight unmanned aerial systems (UASs) for ecological research and conservation, review of the operational aspects of these evolving technologies is limited in the scientific literature. To derive an o…
View article: Topographical effects on the timing of growing season in alpine grasslands
Topographical effects on the timing of growing season in alpine grasslands Open
Context: It is important to understand the responses of alpine vegetation to recent anthropogenic climate change. The mountainous landscapes with high climatic heterogeneity are good locations to investigate the effects of microclimatic va…
View article: Can we predict which species win when new habitat becomes available?
Can we predict which species win when new habitat becomes available? Open
Land cover change is a key component of anthropogenic global environmental change, contributing to changes in environmental conditions of habitats. Deforestation is globally the most widespread and anthropogenically driven land cover chang…
View article: Can we predict which species win when new habitat becomes available?
Can we predict which species win when new habitat becomes available? Open
Land cover change is a key component of anthropogenic global environmental change, contributing to changes in environmental conditions of habitats. These changes can lead to the redistribution of species and shifts in the functional compos…
View article: Books and Drawers full of Moths
Books and Drawers full of Moths Open
The Otago Museum houses one of New Zealand’s largest Lepidoptera collections that consists of more than 31,000 macro moth specimens collected across New Zealand over the last 30 years. Alongside this collection, supplementary information i…
View article: <i>Plateau</i>: a new method for ecologically plausible climate envelopes for species distribution modelling
<i>Plateau</i>: a new method for ecologically plausible climate envelopes for species distribution modelling Open
Summary Ecologists often wish to describe mathematical relationships between response variables and climate covariates in spatial models of species distribution; these relationships are commonly termed climate envelopes . There are many si…
View article: Explaining patterns of avian diversity and endemicity: climate and biomes of southern Africa over the last 140,000 years
Explaining patterns of avian diversity and endemicity: climate and biomes of southern Africa over the last 140,000 years Open
Aim Test hypotheses that present biodiversity and endemic species richness are related to climatic stability and/or biome persistence. Location Africa south of 15° S. Methods Seventy eight HadCM3 general circulation model palaeoclimate exp…
View article: Appendix C. Results of generalized least-square and spatial generalized least-square models for species richness of each group of butterfly species.
Appendix C. Results of generalized least-square and spatial generalized least-square models for species richness of each group of butterfly species. Open
Results of generalized least-square and spatial generalized least-square models for species richness of each group of butterfly species.
View article: Appendix B. Structural equation model diagram for species richness of habitat specialist butterflies when using only the main host plants of habitat specialists.
Appendix B. Structural equation model diagram for species richness of habitat specialist butterflies when using only the main host plants of habitat specialists. Open
Structural equation model diagram for species richness of habitat specialist butterflies when using only the main host plants of habitat specialists.
View article: Appendix A. Results of alternative structural equation models for species richness of each group of butterfly species.
Appendix A. Results of alternative structural equation models for species richness of each group of butterfly species. Open
Results of alternative structural equation models for species richness of each group of butterfly species.