Luise Hermanutz
A5029359439- Climate change and permafrost
- Ecology and Vegetation Dynamics Studies
- Cryospheric studies and observations
- Plant and animal studies
- Tree-ring climate responses
- Geology and Paleoclimatology Research
- Plant Water Relations and Carbon Dynamics
- Fire effects on ecosystems
- Forest Ecology and Biodiversity Studies
- Rangeland and Wildlife Management
- Botany, Ecology, and Taxonomy Studies
- Peatlands and Wetlands Ecology
- Indigenous Studies and Ecology
- Plant Parasitism and Resistance
- Botany and Plant Ecology Studies
- Wildlife Ecology and Conservation
- Forest Management and Policy
- Weed Control and Herbicide Applications
- Insect and Pesticide Research
- Plant Reproductive Biology
- Plant Taxonomy and Phylogenetics
- Land Use and Ecosystem Services
- Flowering Plant Growth and Cultivation
- Plant and fungal interactions
- Plant Ecology and Taxonomy Studies
Memorial University of Newfoundland
2015-2024
University of Bonn
2015
Wisconsin Disability Association
2015
University of Victoria
2015
Tula Foundation
2015
Hakai Institute
2015
Government of Newfoundland and Labrador
2015
Department of Environment and Conservation
2015
University of Massachusetts Amherst
2015
St. John's University
2011-2014
Abstract Recent research using repeat photography, long-term ecological monitoring and dendrochronology has documented shrub expansion in arctic, high-latitude alpine tundra ecosystems. Here, we (1) synthesize these findings, (2) present a conceptual framework that identifies mechanisms constraints on increase, (3) explore causes, feedbacks implications of the increased cover ecosystems, (4) address potential lines investigation for future research. Satellite observations from around...
Ecology Letters (2011) Abstract Understanding the sensitivity of tundra vegetation to climate warming is critical forecasting future biodiversity and feedbacks climate. In situ experiments accelerate change on a small scale forecast responses local plant communities. Limitations this approach include apparent site‐specificity results uncertainty about power short‐term studies anticipate longer term change. We address these issues with synthesis 61 experimental studies, up 20 years duration,...
The BioTIME database contains raw data on species identities and abundances in ecological assemblages through time. These enable users to calculate temporal trends biodiversity within amongst using a broad range of metrics. is being developed as community-led open-source time series. Our goal accelerate facilitate quantitative analysis patterns the Anthropocene.The 8,777,413 abundance records, from consistently sampled for minimum 2 years, which need not necessarily be consecutive. In...
Inference about future climate change impacts typically relies on one of three approaches: manipulative experiments, historical comparisons (broadly defined to include monitoring the response ambient fluctuations using repeat sampling plots, dendroecology, and paleoecology techniques), space-for-time substitutions derived from along environmental gradients. Potential limitations all approaches are recognized. Here we address congruence among these main by comparing degree which tundra plant...
Abstract The majority of variation in six traits critical to the growth, survival and reproduction plant species is thought be organised along just two dimensions, corresponding strategies size resource acquisition. However, it unknown whether global trait relationships extend climatic extremes, if these interspecific are confounded by within species. We test cold extremes life on Earth using largest database tundra yet compiled. show that plants demonstrate remarkably similar economic...
Abstract: Integrating knowledge from across the natural and social sciences is necessary to effectively address societal tradeoffs between human use of biological diversity its preservation. Collaborative processes can change ways decision makers think about scientific evidence, enhance levels mutual trust credibility, advance conservation policy discourse. Canada has responsibility for a large fraction some major ecosystems, such as boreal forests, Arctic tundra, wetlands, temperate oceans....
Abstract Motivation The Tundra Trait Team (TTT) database includes field‐based measurements of key traits related to plant form and function at multiple sites across the tundra biome. This dataset can be used address theoretical questions about strategy trade‐offs, trait–environment relationships environmental filtering, trait variation spatial scales, validate satellite data, inform Earth system model parameters. Main types variable contained contains 91,970 18 traits. most frequently...
Abstract Aim Plant functional groups are widely used in community ecology and earth system modelling to describe trait variation within across plant communities. However, this approach rests on the assumption that explain a large proportion of among species. We test whether four commonly represent six ecologically important traits. Location Tundra biome. Time period Data collected between 1964 2016. Major taxa studied 295 tundra vascular Methods compiled database traits (plant height, leaf...
Traditional food is central to Inuit culture and sense of identity. Recent changes in lifestyle, climate, animal populations have influenced how people practice experience activities on the land. We summarize findings 191 new archived interviews addressing continued relationships berries Canadian territories Nunavut, Nunavik, Nunatsiavut. Berry plants been remain widely used throughout study area. picking an important cultural activity that contributes spiritual, personal, community...
The fundamental niche of many species is shifting with climate change, especially in sub‐arctic ecosystems pronounced recent warming. Ongoing warming regions should lessen environmental constraints on tree growth and reproduction, leading to increased success trees colonising tundra. Nevertheless, variable responses treeline ecotones have been documented association temperatures. One explanation for time lags between increasingly favourable conditions ecotone movement reproductive...
As climate warms, conifers are expected to expand their ranges into alpine tundra where ecological factors such as seedbed availability, and post‐dispersal seed seedling predation may control local recruitment. Seedbed composition influence microhabitat, nutrients, physical structure, level and, therefore, affect the success of conifer recruitment, thereby providing template for future expansion. In boreal forest, seedbed–seedling competition dominates that removal increases black spruce...
Abstract The eastern Canadian Subarctic and Arctic are experiencing significant environmental change with widespread implications for the people, plants, animals living there. In this study, we integrate 10 years of research at Nakvak Brook watershed in Torngat Mountains National Park Canada, northern Labrador, to assess sensitivity ecological geomorphological systems regional climate warming. A time series Normalized Difference Vegetation Index indicates that area has undergone a greening...
Following rapid climate change across the Arctic, tundra plant communities are experiencing extensive compositional shifts. One of most prevalent changes is encroachment boreal species into (‘borealization’). Borealization has been reported at individual sites, but not systematically quantified biome. Here, we use a dataset 1,137 plots 113 subsites 32 study areas resurveyed least once between 1981 and 2023 encompassing 287 vascular species. We i) borealization ecosystems as colonisation...
Betula glandulosa Michx. (Betulaceae) at Tarr Inlet, Baffin Island, Northwest Territories reproduces primarily by vegetative layering with little, if any, viable seed production or seedling recruitment. Information from polymorphic enzyme loci revealed 15 three‐locus genotypes a single genotype usually dominating each of the nine sampled sites. Clonal reproduction combined self‐incompatibility may be one factor contributing to decreased set reducing probability xenogamy. However, multiple...
For land management agencies such as Parks Canada that are tasked with maintaining the ecological integrity of protected, natural landscapes, dealing impacts non-indigenous species on forest succession is a serious concern. In both Terra Nova and Gros Morne National (island Newfoundland, Canada), cumulative non-native negatively affecting capacity dominant conifer, balsam fir (Abies balsamea), to regenerate following canopy disturbance by insects. Early development an understory layer...
Although many studies have focused on factors influencing treeline advance with climate change, less consideration has been given to potential changes in tree spatial pattern across the forest–tundra ecotone. We investigated trends ecotone and geographical variation Yukon, Manitoba, Labrador, Canada. Tree cover was measured contiguous quadrats along transects up 100 m long located Forest, Ecotone, Tundra sections transition. Spatial patterns were analyzed using new local variance estimate...
Abstract Aim Comparisons of how different species respond to changing climatic conditions offer insight into future community composition and the potential formation novel communities. This study investigated changes at a subarctic forest–tundra ecotone, or ‘tree line’. Our objectives were: (1) explore species‐specific growth forms; (2) identify temporal patterns establishment stand density; (3) relationships between climate recruitment/survival amongst co‐dominant tree species, with...
Ecological restoration of degraded habitats is a major conservation activity requiring the collection large amounts native seed. Seed production and genetic quality seed may be influenced by properties source population, such as population size fragmentation, potentially having an impact on goals. We assessed population-size effects seedling performance in two Western Australian wheatbelt eucalypts, Eucalyptus salmonophloia F.Muell. E. salubris Both species were historically widespread...