Breahna M. Gillespie

ORCID: 0000-0003-1464-3747
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About
Contact & Profiles
Research Areas
  • Plant Water Relations and Carbon Dynamics
  • Rangeland and Wildlife Management
  • Remote Sensing and LiDAR Applications
  • 3D Surveying and Cultural Heritage
  • Fern and Epiphyte Biology
  • Remote Sensing in Agriculture
  • Tree Root and Stability Studies
  • Soil and Unsaturated Flow
  • Seed Germination and Physiology
  • Plant Ecology and Soil Science
  • Plant and animal studies
  • Tree-ring climate responses
  • Plant responses to water stress
  • Flowering Plant Growth and Cultivation
  • Ecology and Vegetation Dynamics Studies
  • Hydrology and Sediment Transport Processes
  • Leaf Properties and Growth Measurement
  • Aeolian processes and effects
  • Climate change and permafrost

San Diego State University
2016-2025

University of California, Davis
2019-2024

Abstract Chaparral, a semi‐arid Mediterranean plant community, has the potential to act as sink, which is an essential ecosystem mitigate climate change. However, soil respiration (Rs) responses meteorological variables remain uncertain in these regions, and no studies have quantified how much Rs attributes Reco chaparral shrublands. This study identifies effects of temperature (Ts) water content (SWC) on upscaled its contribution (Rs/Reco) shrublands Southern California between 2020 2021....

10.1029/2023jg007985 article EN cc-by Journal of Geophysical Research Biogeosciences 2025-02-01

Non-forest ecosystems, dominated by shrubs, grasses and herbaceous plants, provide ecosystem services including carbon sequestration forage for grazing, are highly sensitive to climatic changes. Yet these ecosystems poorly represented in remotely sensed biomass products undersampled situ monitoring. Current global change threats emphasize the need new tools capture non-forest at appropriate scales. Here we developed deployed a protocol photogrammetric height using unoccupied aerial vehicle...

10.1002/rse2.228 article EN cc-by Remote Sensing in Ecology and Conservation 2021-07-07

PREMISE OF THE STUDY: California experienced severe drought between 2012 and 2016. During this period, we compared seasonal changes in tissue‐water relations among eight fern species the Santa Monica Mountains of southern to elucidate differential mechanisms survival physiological performance during extreme water deficits. METHODS: We monitored potential ( Ψ md ) dark‐adapted chlorophyll fluorescence F v / m ), assessed including osmotic at saturation turgor loss point π, sat tlp measured,...

10.3732/ajb.1600167 article EN American Journal of Botany 2016-09-01

The reestablishment and enhancement of plant diversity is typically a priority for restoration practitioners. Since stability can be affected by the magnitude to which randomness drives community dynamics, modifying (via habitat heterogeneity) could provide utility vegetation managers. We investigated value using strip seeding manipulate structures communities across grassland in Davis, California. Five years after restoring portions degraded site (0, 33, 50, 66, 100% an area) create patches...

10.1111/rec.12988 article EN Restoration Ecology 2019-05-27

Soil respiration (Rs) is the second largest carbon dioxide (CO2) flux in terrestrial ecosystems, and it provides an average of 30-90% to ecosystem (Reco). In semi-arid there a considerable need expand our knowledge on Rs trends. Chaparral, Mediterranean plant community California, has potential act sink, which essential mitigate climate change. However, responses meteorological variables remain uncertain these regions no studies have quantified how much attributes Reco chaparral shrublands....

10.22541/essoar.170431155.55716020/v1 preprint EN Authorea (Authorea) 2024-01-03

Abstract Non-forest ecosystems, dominated by shrubs, grasses and herbaceous plants, provide ecosystem services including carbon sequestration forage for grazing, yet are highly sensitive to climatic changes. Yet these ecosystems poorly represented in remotely-sensed biomass products undersampled in-situ monitoring. Current global change threats emphasise the need new tools capture non-forest at appropriate scales. Here we assess whether canopy height inferred from drone photogrammetry allows...

10.1101/2020.07.16.206011 preprint EN cc-by-nc bioRxiv (Cold Spring Harbor Laboratory) 2020-07-17

Abstract The dry climate of southern California chaparral can cause substantive water stress on ecosystems that limits productivity throughout the year. From mid-20th century, fog-days have happened less frequently and with decreasing levels thickness in (Witiw & LaDochy 2008), yet summer fog higher winter precipitation been found as key factors explain compositional diversity maritime community (Vasey et al. 2014). While meteorological impact lessens surface radiation chaparral,...

10.21203/rs.3.rs-1399511/v1 preprint EN cc-by Research Square (Research Square) 2022-04-18
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