Landscape-scale characterization of Arctic tundra vegetation composition, structure, and function with a multi-sensor unoccupied aerial system
The Arctic is experiencing some of the most rapid climate change on Earth, with strong impacts on tundra ecosystems that are characterized by high land-surface and vegetation heterogeneity. Previous studies have explored this complexity using satellite remote sensing, however these typically coarse...
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ftdoajarticles:oai:doaj.org/article:1cd3ee28dd2e40109faa30cf29cd61f4 2023-09-05T13:16:58+02:00 Landscape-scale characterization of Arctic tundra vegetation composition, structure, and function with a multi-sensor unoccupied aerial system Dedi Yang Bailey D Morrison Wouter Hantson Amy L Breen Andrew McMahon Qianyu Li Verity G Salmon Daniel J Hayes Shawn P Serbin 2021-01-01T00:00:00Z https://doi.org/10.1088/1748-9326/ac1291 https://doaj.org/article/1cd3ee28dd2e40109faa30cf29cd61f4 EN eng IOP Publishing https://doi.org/10.1088/1748-9326/ac1291 https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/ac1291 1748-9326 https://doaj.org/article/1cd3ee28dd2e40109faa30cf29cd61f4 Environmental Research Letters, Vol 16, Iss 8, p 085005 (2021) Arctic tundra canopy structure plant functional types thermoregulation unoccupied aerial system unmanned aerial vehicle Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 article 2021 ftdoajarticles https://doi.org/10.1088/1748-9326/ac1291 2023-08-13T00:37:08Z The Arctic is experiencing some of the most rapid climate change on Earth, with strong impacts on tundra ecosystems that are characterized by high land-surface and vegetation heterogeneity. Previous studies have explored this complexity using satellite remote sensing, however these typically coarse spatial resolution data have generally missed sub-pixel heterogeneity, leaving critical gaps in our understanding of tundra vegetation dynamics from the community to landscape scales. To address these gaps, we collected very high-resolution (1–5 cm) optical, structural, and thermal data at three low-Arctic tundra sites on the Seward Peninsula, Alaska, using a multi-sensor unoccupied aerial system (UAS). We examined the application of these data to studying tundra vegetation dynamics, by quantifying (a) canopy height and thermoregulation (leaf–air temperature) of representative plant functional types (PFTs), (b) fine-scale patterns of vegetation composition across landscapes, and (c) impacts of fine-scale vegetation composition on landscape-scale variation of canopy height and thermoregulation. Our results show that deciduous tall shrubs (those that can potentially grow >2 m) had a strong cooling effect, with canopy temperatures significantly lower than local air temperatures and other PFTs. Increased cover of tall shrubs also had the potential to reduce the cover of low-stature PFTs across the landscape, potentially associated with their closed canopy (i.e. increased light competition) and strong thermoregulation. To understand the connections between fine-scale vegetation composition and large-scale ecosystem processes, we produced a random forest model which showed that fine-scale PFT composition accounted for 86.8% and 74.2% of the landscape-scale variation in canopy height and thermoregulation, respectively. These findings highlight the importance of spatially detailed characterization of tundra PFTs to improve our ecological understanding and model representation of tundra vegetation, also transcend our study ... Article in Journal/Newspaper Arctic Climate change Seward Peninsula Tundra Alaska Directory of Open Access Journals: DOAJ Articles Arctic Environmental Research Letters 16 8 085005 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic tundra canopy structure plant functional types thermoregulation unoccupied aerial system unmanned aerial vehicle Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
spellingShingle |
Arctic tundra canopy structure plant functional types thermoregulation unoccupied aerial system unmanned aerial vehicle Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 Dedi Yang Bailey D Morrison Wouter Hantson Amy L Breen Andrew McMahon Qianyu Li Verity G Salmon Daniel J Hayes Shawn P Serbin Landscape-scale characterization of Arctic tundra vegetation composition, structure, and function with a multi-sensor unoccupied aerial system |
topic_facet |
Arctic tundra canopy structure plant functional types thermoregulation unoccupied aerial system unmanned aerial vehicle Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
description |
The Arctic is experiencing some of the most rapid climate change on Earth, with strong impacts on tundra ecosystems that are characterized by high land-surface and vegetation heterogeneity. Previous studies have explored this complexity using satellite remote sensing, however these typically coarse spatial resolution data have generally missed sub-pixel heterogeneity, leaving critical gaps in our understanding of tundra vegetation dynamics from the community to landscape scales. To address these gaps, we collected very high-resolution (1–5 cm) optical, structural, and thermal data at three low-Arctic tundra sites on the Seward Peninsula, Alaska, using a multi-sensor unoccupied aerial system (UAS). We examined the application of these data to studying tundra vegetation dynamics, by quantifying (a) canopy height and thermoregulation (leaf–air temperature) of representative plant functional types (PFTs), (b) fine-scale patterns of vegetation composition across landscapes, and (c) impacts of fine-scale vegetation composition on landscape-scale variation of canopy height and thermoregulation. Our results show that deciduous tall shrubs (those that can potentially grow >2 m) had a strong cooling effect, with canopy temperatures significantly lower than local air temperatures and other PFTs. Increased cover of tall shrubs also had the potential to reduce the cover of low-stature PFTs across the landscape, potentially associated with their closed canopy (i.e. increased light competition) and strong thermoregulation. To understand the connections between fine-scale vegetation composition and large-scale ecosystem processes, we produced a random forest model which showed that fine-scale PFT composition accounted for 86.8% and 74.2% of the landscape-scale variation in canopy height and thermoregulation, respectively. These findings highlight the importance of spatially detailed characterization of tundra PFTs to improve our ecological understanding and model representation of tundra vegetation, also transcend our study ... |
format |
Article in Journal/Newspaper |
author |
Dedi Yang Bailey D Morrison Wouter Hantson Amy L Breen Andrew McMahon Qianyu Li Verity G Salmon Daniel J Hayes Shawn P Serbin |
author_facet |
Dedi Yang Bailey D Morrison Wouter Hantson Amy L Breen Andrew McMahon Qianyu Li Verity G Salmon Daniel J Hayes Shawn P Serbin |
author_sort |
Dedi Yang |
title |
Landscape-scale characterization of Arctic tundra vegetation composition, structure, and function with a multi-sensor unoccupied aerial system |
title_short |
Landscape-scale characterization of Arctic tundra vegetation composition, structure, and function with a multi-sensor unoccupied aerial system |
title_full |
Landscape-scale characterization of Arctic tundra vegetation composition, structure, and function with a multi-sensor unoccupied aerial system |
title_fullStr |
Landscape-scale characterization of Arctic tundra vegetation composition, structure, and function with a multi-sensor unoccupied aerial system |
title_full_unstemmed |
Landscape-scale characterization of Arctic tundra vegetation composition, structure, and function with a multi-sensor unoccupied aerial system |
title_sort |
landscape-scale characterization of arctic tundra vegetation composition, structure, and function with a multi-sensor unoccupied aerial system |
publisher |
IOP Publishing |
publishDate |
2021 |
url |
https://doi.org/10.1088/1748-9326/ac1291 https://doaj.org/article/1cd3ee28dd2e40109faa30cf29cd61f4 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Seward Peninsula Tundra Alaska |
genre_facet |
Arctic Climate change Seward Peninsula Tundra Alaska |
op_source |
Environmental Research Letters, Vol 16, Iss 8, p 085005 (2021) |
op_relation |
https://doi.org/10.1088/1748-9326/ac1291 https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/ac1291 1748-9326 https://doaj.org/article/1cd3ee28dd2e40109faa30cf29cd61f4 |
op_doi |
https://doi.org/10.1088/1748-9326/ac1291 |
container_title |
Environmental Research Letters |
container_volume |
16 |
container_issue |
8 |
container_start_page |
085005 |
_version_ |
1776198350948794368 |