Forests in the Anthropocene

Guz, Jaclyn; Kulakowski, Dominik

doi:10.1080/24694452.2020.1813013

Cited by 5 publications

(10 citation statements)

References 64 publications

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“…In these areas, management should focus on preventing human‐ignitions and secondary disturbances (i.e. post‐disturbance logging; Guz & Kulakowski, 2020).…”

Section: Discussionmentioning

confidence: 99%

“…latifolia ) are resilient through their serotinous cones but are not resistant to high‐severity fires. As we move into the Anthropocene, distinguishing resistance and resilience allows scientists and managers to more precisely consider ecological change and to develop appropriate strategies, given broader management goals (DeRose & Long, 2014; Guz & Kulakowski, 2020). Thus, we use resilience to refer to the capacity of a system to recover from and tolerate perturbations without shifting to a different state controlled by different processes (Holling, 1973).…”

Section: Introductionmentioning

confidence: 99%

“…The present study is unique because it exceeds the time of continuous satellite records and accounts for almost seven decades of how climate has influenced lodgepole pine resilience. Quantifying changes in long‐term resilience is necessary to create baselines of what is truly characteristic of ecosystems that may be departing from historical trends and to optimize future ecosystem management plans (Guz & Kulakowski, 2020; Keane et al., 2018).…”

Section: Introductionmentioning

confidence: 99%

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Long‐term empirical evidence shows post‐disturbance climate controls post‐fire regeneration

2021

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Increased wildfire activity and climate change have intensified disturbance regimes globally and have raised concern among scientists and land managers about the resilience of disturbed landscapes. Here we test the effects of climate, topographic variation and pre‐fire stand structure on regeneration in lodgepole pine (Pinus contorta var. latifolia) forests following high‐severity fire over the past seven decades. We surveyed lodgepole pine regeneration 8–67 years after eight high‐severity fires in western Colorado and southern Wyoming. We used dendroecological methods and machine learning to (a) identify temporal trends in post‐fire regeneration and (b) examine influences of climate on post‐fire regeneration, with focus on post‐fire establishment, initial post‐fire density and radial growth. All burned sites reached a median stocking density of ≥150 seedlings/ ha, but there was a large range of spatial heterogeneity, with regeneration being absent or scarce in many plots, implying a trend of increasing patchiness with likely cascading effects on subsequent patterns and processes. Our analysis indicated that (a) post‐fire regeneration is influenced by pre‐fire stand structure (stand age and density), elevation and post‐fire minimum temperature; (b) pre‐fire densities of >14,000 stems/ha promoted successful stocking (≥150 seedlings/ha) and reduced lag between the disturbance and initial regeneration; and (c) minimum post‐fire temperatures >−1.6°C reduced lag of initial regeneration and promoted initial radial growth. Synthesis. Our study demonstrates that lodgepole pine in high‐elevation forests are regenerating following fires under recent climatic trends, but that regeneration is affected by post‐fire climatic conditions. Importantly, forest patchiness may be increasing in a way that affects future ecological dynamics and may compromise the resilience of these systems.

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“…In these areas, management should focus on preventing human‐ignitions and secondary disturbances (i.e. post‐disturbance logging; Guz & Kulakowski, 2020).…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Long‐term empirical evidence shows post‐disturbance climate controls post‐fire regeneration

2021

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“…latifolia). Subalpine forests were historically less impacted by fire suppression and other land management compared to lower elevation forests, making them good historians of climate-fire relationships [2]. Increased burning and hotter and drier post-fire climate conditions have consequences for tree regeneration, ecosystem connectivity, and total forested areas [1].…”

Section: Introduction 1wildfires and Climate Changementioning

confidence: 99%

“…2022, 14, 1363 2 of 14 MCA, increased fire activity and temperature converted the lower tree line from a dense closed-canopy forest to the lower-density ribbon forest we have today [3]. Additionally, burning during the MCA reduced ecosystem connectivity, which could negatively impact ecosystem conservation if it were to recur [2,4].…”

Section: Introduction 1wildfires and Climate Changementioning

confidence: 99%

The Influence of Burn Severity on Post-Fire Spectral Recovery of Three Fires in the Southern Rocky Mountains

2022

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Increased wildfire activity and altered post-fire climate in the Southern Rocky Mountains has the potential to influence forest resilience. The Southern Rocky Mountains are a leading edge of climate change and have experienced record-breaking fires in recent years. The change in post-fire regeneration and forest resilience could potentially include future ecological trajectories. In this paper, we examined patterns of post-fire spectral recovery using Landsat time series. Additionally, we utilized random forest models to analyze the impact of climate and burn severity on three fire events in the Southern Rocky Mountains. Fifteen years following the fires, none of the burned stands fully recovered to their pre-fire spectral states. The results suggested that burn severity significantly impacted post-fire spectral recovery, but that influence may decrease as time since fire increases. The biggest difference in forest recovery was among fire events, indicating that post-fire climate may be influential in post-fire recovery. The mean and minimum growing-season temperatures were more significant to post-fire recovery than the variability in precipitation, which is consistent with field-based analysis. The present study indicated that, as warming continues, there may be changes in forest density where forests are not regenerating to their pre-fire spectral states. Additionally, this study emphasizes how high-elevation forests continue to regenerate after fires, but that regeneration is markedly affected by post-fire climate.

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Emotional geographies of an urban forest: Insights from an email‐a‐tree initiative

Atchison,

Brennan‐Horley,

Phillips

et al. 2023

Geographical Research

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International and national policies are being used to prioritise increases in urban forest coverage and diversity, support equitable access to urban greenspaces, and advance sound environmental governance outcomes. Yet, the relationship between people’s feelings about urban trees and public policy remains under‐examined. Drawing on a unique dataset from an email‐a‐tree initiative, the objectives of this study were to identify how concern and connection for urban trees is expressed and determine how insights from the initiative might inform urban forest governance. We examined emails sent to trees using a mixed‐methods approach that included qualitative coding, VADER sentiment analysis, and statistical and spatial analyses. We identified and considered three themes based on emails sent by members of the public and municipal tree inventory data. Those themes were location, age and loss, and type. In accord with other studies, overall sentiment for urban trees was positive and underscored people’s strong connections with trees, often based on routine and repeated engagements. However, people noticed and were concerned about a limited range of trees and tree types in urban settings. Based in Melbourne, Australia, our case study shows how examining feelings for trees helps residents and researchers understand urban tree relationships and gauge how those designing public engagement programs might learn from such an initiative to create meaningful opportunities for active participation in governance.

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Forests in the Anthropocene

Cited by 5 publications

References 64 publications

Long‐term empirical evidence shows post‐disturbance climate controls post‐fire regeneration

Long‐term empirical evidence shows post‐disturbance climate controls post‐fire regeneration

The Influence of Burn Severity on Post-Fire Spectral Recovery of Three Fires in the Southern Rocky Mountains

Emotional geographies of an urban forest: Insights from an email‐a‐tree initiative

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