Data Submission Package for Manuscript 'Moving beyond the physical impervious surface impact and urban habitat fragmentation of Alaska: Quantitative Human Footprint Inference from the first large Scale 30m high-resolution Landscape Metrics Big Data Quantification in R and the Cloud'

Document Type

Article

Abstract

With increased globalization, man-made climate change, and urbanization the landscape – embedded within the Pyrocene as part of the Anthropocene - becomes increasingly more fragmented, with habitats transitioning and getting lost; globally relevant regions considered ‘pristine' such as Alaska are no exception. Alaska holds 60% of the U.S. National Park system’s area and is of national and international importance, considering the U.S. is one of the wealthiest nations on earth. Roads, houses, mines, wind parks, agriculture, trails, etc. are just a few of the features humans created that can be summarized as ‘impervious surfaces’. Those are physical impacts and actively affecting urban-driven landscape fragmentation. Using the remote sensing data of the National Land Cover Database (NLCD; https://www.mrlc.gov/data/nlcd-2016-land-cover-alaska ), here we attempt to create the first quantification of this physical human impact on the Alaskan landscape and its fragmentation. We quantified these impacts using the well-established landscape metrics tool ‘Fragstats’, implemented as the R package “landscapemetrics” in the desktop software and through the interface of a Linux Cloud-computing environment. This workflow allows for the first time to overcome the computational limitations of the conventional Fragstats software within a reasonably quick timeframe. Thereby, we are able to analyze a land area as large as approx. 1,517,733 km2 (state of Alaska) while maintaining a high assessment resolution of 30 meters. Based on this traditional methodology, we found that Alaska has a reported physical human impact of c. 0.067%. But when assessed, we additionally overlaid other features that were not included in the input data to highlight the overall true human impact (including governances in game management unit boundaries, park boundaries, mines, etc.). We found that using remote sensing, Alaska’s human impact is actually considerably underestimated to a meaningless estimate and that the state is more seriously fragmented and affected by humans than commonly assumed. Very few areas are truly untouched and overall it displays a high patch density with corresponding low mean patch sizes throughout the study area. Instead, the true human impact is likely close to 100% throughout Alaska for several metrics. With these newly created insights, we provide the first state-wide landscape data and inference that are likely of considerable importance for land management entities in the state of Alaska, and for the U.S. National Park systems overall, especially in the changing climate. Likewise, the methodological framework presented here shows an Open Access workflow and can be used as a reference to be reproduced virtually anywhere else on the planet to assess more realistic large-scale landscape metrics and human impacts on the landscape in an Open GIS environment for more sustainable landscape stewardship and mitigation in policy.

Publication Date

11-5-2024

Handle

http://hdl.handle.net/11122/15640

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