Cited by Approche cartographique par le SIG GRASS pour l'analyse de la structure du paysage au Libéria, Afrique de l'Ouest

Approche cartographique par le SIG GRASS pour l'analyse de la structure du paysage au Libéria, Afrique de l'Ouest DOI

Dynamiques environnementales, Journal Year: 2024, Volume and Issue: 53, P. 1 - 36

Published: Jan. 1, 2024

L'extraction automatique des caractéristiques du paysage est de plus en rendue possible grâce à l'utilisation croissante algorithmes SIG et méthodes avancées d'analyse données géospatiales. L'article aborde le potentiel GRASS pour l'analyse la géométrie unités travers calcul raster. Les ont été obtenues se basant sur images satellites classifiées Libéria, Afrique l'Ouest, entre 2014 2023. La dynamique a analysée dans les changements diachroniques six indices indiquant déforestation au Libéria : indice densité paysagères, forme, numéro paysage, écart type, coefficient variation plage patch. L'analyse numérique effectuée techniquement utilisant script par modules suivants r.li.patchdensity, r.li.shape, r.li.patchnum, r.li.padsd, r.li.padcv r.li.padrange. A l’échelle parcellaire, l’indice forme passé 2,86 4,09 2023, ce qui indique l’augmentation somme longueurs bords donc une fragmentation accrue parcellaire. courbure zone paysagère séparabilité éléments individuels indiquent également processus mais forêts. Cette différentes échelles s’accompagne d’une baisse notable part forêt dense, information prouvée valeurs inférieures patchs 2023 (1,15) qu’en (1,68). En global, superficie forestière réduite 12 % suggère un taux annuel moyen 0,9 Liberia.

Demographic compensation occurs in populations of Quercus oleoides Schltdl & Cham in fragments across an altitudinal gradient DOI

Carlos Flores-Romero, Lázaro Rafael Sánchez‐Velásquez, Miguel Equihua

et al.

PeerJ, Journal Year: 2025, Volume and Issue: 13, P. e18980 - e18980

Published: Feb. 24, 2025

Background Demographic compensation is a complex process by which populations can compensate for the effects of anthropogenic disturbance and other environmental changes restore growth-rate stability ( λ » 1). Dynamic equilibrium achieved when growth rate [λ] close to one. This enables population persist under changing conditions. The demographics fragmented provides an ideal model explore processes adapt through demographic responses. Aims To characterize Quercus oleoides detect various that result from Methods We established permanent plots in three Q. at annual transition stages were registered. These survival probability, average reproduction (that is, number seed production size class). Results λs study >1.0 P < 0.005). However, differences found elasticity matrices, as well life-table response experiment (LTRE) variation analyses. Conclusions have shown affected balance different strategies their vital rates.

Language: Английский

Citations

Coordinating old-growth conservation across scales of space, time, and biodiversity: lessons from the US policy debate DOI

Carlos Carroll,

Barry R. Noon,

Susan A. Masino

et al.

Frontiers in Forests and Global Change, Journal Year: 2025, Volume and Issue: 8

Published: April 9, 2025

Conservation of old-growth forests and their biodiversity climate benefits requires coordinated actions across spatiotemporal scales, including restrictions on harvest old mature trees longer-term landscape planning for recovery. In 2024, the US government drafted a National Old-Growth Amendment (NOGA) to enhance consideration growth in planning. The amendment was never finalized due change administrations. However, debate associated with proposed NOGA remains relevant several reasons. key points also underpin discussion regarding ongoing regional policy initiatives such as amendments Northwest Forest Plan (NWFP). illustrates questions that should inform national under future Lastly, highlights challenges common globally nations implement Kunming-Montreal Global Biodiversity Framework. Although provides useful foundation initiatives, more attention must be paid implications variation context which occurs ecosystems. New learn from efforts, NWFP’s insights design reserves is essential conservation species, services, processes Reserves, conceived places where extractive uses are restricted but beneficial human activities supported, compatible strategies ecosystem restoration Indigenous-led conservation. An approach builds NOGA’s adaptive can form long-term forest ecosystems by protecting refugia, addressing barriers connectivity, enhancing monitoring capacity. Ecosystem-based standards needed ensure protection so recruitment into stage shifts towards historic proportions growth. addition clarifying goals ecological integrity, comprehensive incorporate recovering at-risk species based relationships scales between habitat viability. Land management agencies need articulate vision recovery depleted elements (including both naturally disturbed younger stands) via designation large areas anchored remaining stands, surrounded managed native biodiversity, services.

Language: Английский

Citations

Measuring forest degradation via ecological-integrity indicators at multiple spatial scales DOI