The Spatial Distribution and Ecological Impacts of Aeolian Soil Erosion in Kangerlussuaq, West Greenland

Heindel, Ruth C.; Chipman, Jonathan; Virginia, Ross A.

doi:10.1080/00045608.2015.1059176

Cited by 33 publications

(40 citation statements)

References 43 publications

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“…Long-term changes in plant community composition driven by geomorphic processes (Heindel et al, 2015), climate warming and/or large herbivores will also influence the link between terrestrial and aquatic environments by altering terrestrial C pools. The low-shrub tundra in the region has displayed divergent responses to warming when large herbivores were excluded.…”

Section: How Are These Linkages Across the Landscape Changing?mentioning

confidence: 99%

The Arctic in the Twenty-First Century: Changing Biogeochemical Linkages across a Paraglacial Landscape of Greenland

Anderson¹,

Saros²,

Bullard³

et al. 2017

BioScience

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The Kangerlussuaq area of southwest Greenland encompasses diverse ecological, geomorphic, and climate gradients that function over a range of spatial and temporal scales. Ecosystems range from the microbial communities on the ice sheet and moisture-stressed terrestrial vegetation (and their associated herbivores) to freshwater and oligosaline lakes. These ecosystems are linked by a dynamic glacio-fluvial-aeolian geomorphic system that transports water, geological material, organic carbon and nutrients from the glacier surface to adjacent terrestrial and aquatic systems. This paraglacial system is now subject to substantial change because of rapid regional warming since 2000. Here, we describe changes in the eco- and geomorphic systems at a range of timescales and explore rapid future change in the links that integrate these systems. We highlight the importance of cross-system subsidies at the landscape scale and, importantly, how these might change in the near future as the Arctic is expected to continue to warm.

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Section: How Are These Linkages Across the Landscape Changing?mentioning

confidence: 99%

The Arctic in the Twenty-First Century: Changing Biogeochemical Linkages across a Paraglacial Landscape of Greenland

Anderson¹,

Saros²,

Bullard³

et al. 2017

BioScience

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“…About 15% of landscape is covered by freshwater lakes and ponds within a matrix of tundra vegetation dominated by shrubs and graminoids (Heindel et al 2015). The only mosquito species in our study area is Aedes nigripes Zett.…”

Section: Study Systemmentioning

confidence: 99%

Spatial heterogeneity in the abundance and fecundity of Arctic mosquitoes

2018

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Citation: Culler, L. E., M. P. Ayres, and R. A. Virginia. 2018. Spatial heterogeneity in the abundance and fecundity of Arctic mosquitoes. Ecosphere 9(8):Abstract. The abundance of mosquitoes is strongly influenced by biotic and abiotic factors that act on the immature (aquatic) and adult (terrestrial) life stages. Rapid changes in land use and climate, which impact aquatic and terrestrial mosquito habitat, necessitate studying the ecological mechanisms, and their interplay with the changing environment, that affect mosquito abundance. These data are crucial for anticipating how environmental change will impact their roles as pests, disease vectors, and in food webs. We studied a population of Arctic mosquitoes (Aedes nigripes, Diptera: Culicidae) in western Greenland, a region experiencing rapid environmental change, to quantify spatial variation in adult abundance and reproduction. Using sweep nets, we collected about sevenfold more mosquitoes within the town of Kangerlussuaq and within a low-elevation tundra valley compared to three other tundra locations. Dissections of adult female mosquitoes revealed that only 17% were gravid overall, with a range of 7-43% among sites. If gravid, mosquitoes matured an average of 60 eggs per individual-more in larger females. We found no indication of autogenous egg development. Analyses using our field data indicated that spatial variation in adult fecundity and survival of immatures could each account for a 10-fold range in the per capita growth of mosquito populations. The availability of vertebrate hosts and aquatic habitat is changing in many parts of the Arctic and can be expected to influence Arctic mosquito abundance. In the Arctic, and elsewhere, life-history data from natural populations of mosquitoes will significantly aid in understanding controls on the abundance of these globally ubiquitous insects.

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“…Landsat 5 TM was applied by Turner et al [66] in 2014 for identifying relations between catchment land cover characteristics and lake hydrology, concluding that remote sensing data alone cannot answer the related questions. Aeolian soil erosion, which can also be responsible for erosional landforms, or deflation patches have been studied in Kangerlussuaq, West Greenland [67], as well as the Yamal peninsula in Russia [68]. In both cases, high resolution satellite data were analyzed (WorldView-2 and GeoEye-1, respectively).…”

Section: Permafrost Subsurface and Land Surface Featuresmentioning

confidence: 99%

“…Comparison of the number of classes and spatial resolution from land cover classifications north of the treeline for different applications. (sources: [9,11,13,23,25,26,35,[40][41][42]47,50,52,56,59,63,64,66,67,69,73,75,96,97,[100][101][102][103]110]).…”

Section: Challenges and Promising Approachesmentioning

confidence: 99%

Land Cover Mapping in Northern High Latitude Permafrost Regions with Satellite Data: Achievements and Remaining Challenges

et al. 2016

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Most applications of land cover maps that have been derived from satellite data over the Arctic require higher thematic detail than available in current global maps. A range of application studies has been reviewed, including up-scaling of carbon fluxes and pools, permafrost feature mapping and transition monitoring. Early land cover mapping studies were driven by the demand to characterize wildlife habitats. Later, in the 1990s, up-scaling of in situ measurements became central to the discipline of land cover mapping on local to regional scales at several sites across the Arctic. This includes the Kuparuk basin in Alaska, the Usa basin and the Lena Delta in Russia. All of these multi-purpose land cover maps have been derived from Landsat data. High resolution maps (from optical satellite data) serve frequently as input for the characterization of periglacial features and also flux tower footprints in recent studies. The most used map to address circumpolar issues is the CAVM (Circum Arctic Vegetation Map) based on AVHRR (1 km) and has been manually derived. It provides the required thematic detail for many applications, but is confined to areas north of the treeline, and it is limited in spatial detail. A higher spatial resolution circumpolar land cover map with sufficient thematic content would be beneficial for a range of applications. Such a land cover classification should be compatible with existing global maps and applicable for multiple purposes. The thematic content of existing global maps has been assessed by comparison to the CAVM and regional maps. None of the maps provides the required thematic detail. Spatial resolution has been compared to used classes for local to regional applications. The required thematic detail increases with spatial resolution since coarser datasets are usually applied over larger areas covering more relevant landscape units. This is especially of concern when the entire Arctic is addressed. A spatial resolution around 30 m has been shown to be suitable for a range of applications. This implies that the current Landsat-8, as well as Sentinel-2 missions would be adequate as input data. Recent studies have exemplified the value of Synthetic Aperture Radar (SAR) in tundra regions. SAR missions may be therefore of added value for large-scale high latitude land cover mapping. Remote Sens. 2016, 8, 979 2 of 27with climate change in the upcoming decades [2]. It has been pointed out by a range of studies (e.g., Westermann et al. [1] and Ottle et al. [3]) that there is a need for accurate land cover description in the northern high latitudes. A suitable circumpolar map does not yet exist to date, although a range of studies demonstrated the suitability of satellite data for this purpose on local and regional scales.A first review on traditional Arctic land cover maps as a baseline for the development of a circumpolar map was already published in 1995 by Walker et al. [4]. The Circum-Arctic Vegetation Map (CAVM) has in the following been developed using satellite data (Advanced Very Hi...

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The Spatial Distribution and Ecological Impacts of Aeolian Soil Erosion in Kangerlussuaq, West Greenland

Cited by 33 publications

References 43 publications

The Arctic in the Twenty-First Century: Changing Biogeochemical Linkages across a Paraglacial Landscape of Greenland

The Arctic in the Twenty-First Century: Changing Biogeochemical Linkages across a Paraglacial Landscape of Greenland

Spatial heterogeneity in the abundance and fecundity of Arctic mosquitoes

Land Cover Mapping in Northern High Latitude Permafrost Regions with Satellite Data: Achievements and Remaining Challenges

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