Assessing the effects of burn severity on post-fire tree structures using the fused drone and mobile laser scanning point clouds DOI Creative Commons

Yangqian Qi,

Nicholas C. Coops, Lori D. Daniels

и другие.

Frontiers in Environmental Science, Год журнала: 2022, Номер 10

Опубликована: Авг. 31, 2022

Wildfires burn heterogeneously across the landscape and create complex forest structures. Quantifying structural changes in post-fire forests is critical to evaluating wildfire impacts providing insights into severities. To advance understanding of severities at a fine scale, attributes individual tree level need be examined. The advent drone laser scanning (DLS) mobile (MLS) has enabled acquisition high-density point clouds resolve structures trees. Yet, few studies have used DLS MLS data jointly examine their combined capability describe assess 2017 Elephant Hill British Columbia, Canada, we scanned trees that experienced range 2 years using both MLS. After fusing data, reconstructed quantitative structure models compute 14 biometric, volumetric, crown attributes. At level, our suggest smaller pre-fire tend experience higher levels scorch than larger Among with similar sizes, those within mature stands (age class: > 50 years) had lower young 15—50 years). small- medium-diameter trees, experiencing high crowns unevenly distributed branches compared unburned In contrast, large-diameter were more resistant scorch. plot low-severity fires minor effects, moderate-severity mostly decreased height, high-severity significantly reduced diameter breast biomass. Our exploratory factor analyses further revealed dominated by large sizes relatively wide spacing could less severely characterized regenerating fuel density continuity. Overall, results demonstrate fused DLS-MLS can effective quantifying structures, which facilitates foresters develop site-specific management plans. findings imply abundance configuration vital controlling

Язык: Английский

Cone allometry and seed protection from fire are similar in serotinous and nonserotinous conifers DOI Creative Commons
David F. Greene, Jeffrey M. Kane, Edith Pounden

и другие.

New Phytologist, Год журнала: 2024, Номер 242(1), С. 93 - 106

Опубликована: Фев. 20, 2024

Summary Serotiny is an adaptive trait that allows certain woody plants to persist in stand‐replacing fire regimes. However, the mechanisms by which serotinous cones avoid seed necrosis and nonserotinous species landscapes with short cycles competitors remain poorly understood. To investigate whether ovulate cone traits enhance survival differ between species, we examined 24 within Pinaceae Cupressaceae based on physical measurements heating simulations using a computational fluid dynamics model. Fire‐relevant were largely similar types; those differed (e.g. density moisture) conferred little advantage under simulated fire. The most important influencing size depth cone, was found be allometric function of mass for both types. Thus, should not suffer significantly greater than equal size. Closed containing mature seeds may achieve substantial regeneration after if they are sufficiently large relative duration temperature. our knowledge, this comprehensive study effects fire‐relevant conifer supported physics‐based simulation.

Язык: Английский

Процитировано

5
The Effects of Crown Scorch on Post-fire Delayed Mortality Are Modified by Drought Exposure in California (USA) DOI Creative Commons
Jason S. Barker, Andrew N. Gray, Jeremy S. Fried

и другие.

Fire, Год журнала: 2022, Номер 5(1), С. 21 - 21

Опубликована: Фев. 2, 2022

Accurately predicting the mortality of trees that initially survive a fire event is important for management, such as planning post-fire salvage, planting, and prescribed fires. Although crown scorch has been successfully used to predict (greater than one-year post-fire), it remains unclear whether other first-order effect metrics (e.g., stem char) information on growing conditions can improve predictions. Droughts also elevate may interact, synergistically, with effects influence tree survival. We logistic regression test drought exposure, indicated by summarized monthly Palmer Drought Severity Index (PDSI) over ten-years could predictions delayed (4–9 years post-fire) at individual level in fire-affected forest inventory analysis (FIA) plots California (USA). included scorch, bark thickness, char, soil slope, aspect model predictors. selected six most prevalent species include model: canyon live oak, Douglas-fir, Jeffrey pine, incense-cedar, ponderosa white fir. Mean mortality, based count, across all FIA was 17%, overall accuracy good (AUC = 79%). Our performed well, correctly survivor (sensitivity 0.98) but had difficulty smaller number (specificity 0.27) standard probability=0.5 threshold. Crown influential predictor mortality. Increasing associated greater risk species, exhibiting 75% having probability dying exceeded 0.5. levels char (first order indicators) were increasing less scorch. expected exposure would increase we found (median minimum PDSI) modest decrease However, did find high likely PDSI). Delayed decreased terrain slope increased. Taken together, our results suggest substantial damage be more vulnerable if exposed an effective up 10 post-fire.

Язык: Английский

Процитировано

16
Severity, Logging and Microsite Influence Post-Fire Regeneration of Maritime Pine DOI Creative Commons
Cristina Carrillo, Carmen Hernando, Carmen Díez

и другие.

Fire, Год журнала: 2024, Номер 7(4), С. 125 - 125

Опубликована: Апрель 8, 2024

We investigated the influence of fire severity, logging burnt wood, local ecological factors and their interaction on natural regeneration, survival growth maritime pine (Pinus pinaster Ait.), following a that took place in 2005. During period 2006–2020, sample 1900 seedlings were monitored, which three post-fire treatments applied: (1) Early (before seedling emergence); (2) Delayed (after (3) No management. Multivariate semi-parametric non-parametric techniques used to model survival, estimated density regeneration. Seedling was 31% with mean more than 2000 seedlings/ha at end study period. Logging before emergence positively related density. resulted lowest Fire severity had negative regeneration The findings indicate site conditions have stronger subsequent management treatments. In order ensure presence pure or mixed stands, silvicultural work is required control competition from other species reduce risk new wildfires.

Язык: Английский

Процитировано

3
Mechanisms of fire-caused tree death are far from resolved DOI
Rachael H. Nolan, Charlotte C. Reed, Sharon M. Hood

и другие.

Tree Physiology, Год журнала: 2024, Номер 44(7)

Опубликована: Июнь 21, 2024

Journal Article Accepted manuscript Mechanisms of fire-caused tree death are far from resolved Get access Rachael H Nolan, Nolan Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith NSW 2751, Australia Corresponding author. Australia. Email: [email protected] Search other works by this author on: Oxford Academic PubMed Google Scholar Charlotte C Reed, Reed USDA Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory, 5775 US Highway 10 W, Missoula, MT59808, USADivision Biological Sciences, University Montana, 32 Campus Drive, MT 59812, USA https://orcid.org/0000-0003-3280-9982 Sharon M Hood Tree Physiology, tpae073, https://doi.org/10.1093/treephys/tpae073 Published: 21 June 2024 history Received: 03 April Revision received: 13 Accepted: 20

Язык: Английский

Процитировано

3
Forest structural complexity and ignition pattern influence simulated prescribed fire effects DOI Creative Commons
Sophie R. Bonner, Chad Hoffman, Rodman Linn

и другие.

Fire Ecology, Год журнала: 2024, Номер 20(1)

Опубликована: Сен. 13, 2024

Язык: Английский

Процитировано

3
Rapid ecological data collection from 360‐degree imagery using visualisation and immersive sampling in the R pannotator package DOI Creative Commons
Robert C. Godfree, Nunzio Knerr

Methods in Ecology and Evolution, Год журнала: 2025, Номер unknown

Опубликована: Фев. 3, 2025

Abstract With rapid environmental change occurring globally there is an urgent need for new field survey methods that enable fast and efficient collection of ecological information from impacted systems. Advances in 360‐degree (panospheric) camera technology now allow the geospatially explicit visual records properties far more cheaply, quickly efficiently than traditional methods. However, generalisable workflows software platforms to manage, extract, process use large panospheric image datasets are still lacking. Here we develop a flexible, integrative workflow acquisition, preparation extraction macroscopic data imagery. We introduce open‐source R package Panospheric Image Annotator (pannotator), which allows user visualise annotate images extract cropped geocoded sub‐images repeatable, systematic way using customisable drop‐down menus help files. demonstrate pannotator panoramic collected study area at Uluṟu‐Kata Tjuṯa National Park central Australia, was affected by severe drought fire 2018–2020. In this study, 180 were captured GoPro Max cameras imported into annotation. extracted three key attributes (plant species distribution, understorey cover tree health) show how these can be used spatially reconstruct richness community structure, plant size class, mortality burn history. Modern immersive sampling offer transformative solution capturing extracting biogeographical surveys. More generally, may any georeferenced imagery generate with embedded geolocation downstream artificial intelligence/machine learning–based applications.

Язык: Английский

Процитировано

0
Vegetation–fuel–fire feedbacks in patches of longleaf pine (Pinus palustris Mill.) regeneration DOI Creative Commons

G.A. Jensen,

Benjamin O. Knapp, Jeffery B. Cannon

и другие.

Fire Ecology, Год журнала: 2025, Номер 21(1)

Опубликована: Март 17, 2025

Язык: Английский

Процитировано

0
The Role of Urban Vegetation in Mitigating Fire Risk Under Climate Change: A Review DOI Open Access
Zhang Deshun,

Manqing Yao,

Yingying Chen

и другие.

Sustainability, Год журнала: 2025, Номер 17(6), С. 2680 - 2680

Опубликована: Март 18, 2025

The confluence of global warming, the urban heat island effect, and alterations in nature underlying surfaces has led to a continuous escalation frequency, scale, intensity fires within green spaces. Mitigating or eliminating adverse effects such on service functions ecosystems, while enhancing resilience greening systems disaster prevention risk reduction, become pivotal challenge modern development management. Academic focus progressively broadened from isolated forest domains encompass more intricate environments Wildland–Urban Interface (WUI) urban–suburban forests, with particular emphasis distinctive characteristics in-depth research. This study employs combination CiteSpace bibliometric analysis narrative literature review comprehensively examine three critical aspects fire safety as follows: (1) evaluation fire-resistant performance landscape plants spaces; (2) mechanisms behavior systems; (3) assessment prediction risks. Our findings indicate that play crucial role controlling spread spaces by providing physical barriers inhibiting combustion processes, thereby mitigating propagation. However, diversity non-native greenery species present challenges. existing research lacks standardized experimental indicators often focuses single-dimensional analyses, leading conclusions are limited, inconsistent, even contradictory. Furthermore, most current models designed primarily for forests wildland–urban interface regions. Empirical semi-empirical dominate this field, yet future advancements will likely involve coupled integrate climate environmental factors. Fire represent hotspot, machine learning- deep learning-based approaches increasingly gaining prominence. These advanced methods have demonstrated superior accuracy compared traditional techniques predicting synthesis aims elucidate state, trends, deficiencies Future should explore screening highly resistant plants, goal bolstering ecological theoretical underpinnings realization sustainable security.

Язык: Английский

Процитировано

0
Integrating fire predisposition assessment into decision support systems for mountain forest management DOI Creative Commons
Simon Mutterer, Janine Schweier, Leo Bont

и другие.

MethodsX, Год журнала: 2025, Номер 14, С. 103332 - 103332

Опубликована: Апрель 25, 2025

Язык: Английский

Процитировано

0
Longleaf and shortleaf pine seedling fire tolerance is more sensitive to shade than encroaching hardwood species DOI
John Willis, Ajay Sharma, Timothy M. Shearman

и другие.

Forest Ecology and Management, Год журнала: 2025, Номер 589, С. 122782 - 122782

Опубликована: Май 8, 2025

Язык: Английский

Процитировано

0