Michael Graham results 243
· Newest (Page 1/10, per page 25)
Author: Michael Graham ×Clear All Filters
Search Results
Wetlands are collectively the largest natural source of methane (CH 4 ), which complicates the climate mitigation potential of wetland restoration. Land‐use change alters wetland soils, vegetation, and hydrology, but the impact of this disturbance legacy on CH 4 fluxes from restored wetlands is uncertain. To better understand CH 4 dynamics across a gradient of human disturbance, we examined 5 yr of continuous CH 4 flux data fr...
The critically endangered geophyte Gladiolus aureus threatened by a wilt disease associated with Fusarium libertatisNARA Subscribed
Gladiolus aureus is a geophyte species endemic to the South African Cape Peninsula. Pressures including land-use change and invasion by alien plants have caused severe population declines, leading to its classification as Critically Endangered (CR). Kirstenbosch National Botanical Garden (NBG) maintains the largest ex situ collection of this species. During plant health surveys conducted as part of a sentinel plant research pr...
Amur honeysuckle ( Lonicera maackii [Rupr.] Herder) and other invasive shrubs represent a serious threat to the biodiversity and ecosystem services of forests in the eastern United States. Treating invasive shrubs can be costly and time consuming, highlighting the need for efficient techniques to control heavy invasions across large areas of forest. Mulching-heads have shown promise for efficiently controlling multiple species...
Ocean Heat Content Sets Another Record in 2025NARA Subscribed
Global ocean warming continued unabated in 2025 in response to increased greenhouse gas concentrations and recent reductions in sulfate aerosols, reflecting the long-term accumulation of heat within the climate system, with conditions evolving toward La Niña during the year. In 2025, global upper 2000 m ocean heat content (OHC) increased by ∼23 ± 8 ZJ relative to 2024 according to IAP/CAS estimates. CIGAR-RT, and Copernicus Ma...
The Toxicology Investigators Consortium 2024 Annual ReportNARA Subscribed
From sample to sonde to Sentinel-2: insights from a multi-scale chlorophyll-a monitoring effort in the Hudson River, New YorkNARA Subscribed
Monitoring cyanobacteria and other nuisance phytoplankton in the Hudson River is of great interest given its societal and ecological importance. Satellite remote sensing provides a cost-effective method to monitor chlorophyll- a (chl-a), a common proxy for algal biomass; however, the dynamic nature of rivers complicates approaches traditionally applied to lakes and oceans. During 2021–2023, we collected discrete samples for la...
Terrestrial Laser Scanning for the Estimation of Above Ground Biomass of Mangrove Roots by Modelling Them as Inverted TreesNARA Subscribed
The complex root systems of mangroves such as Rhizophora spp. can hold up to 40% of the total tree biomass yet have usually been neglected in the assessment of the aboveground biomass (AGB). Traditional measurements of AGB can be laborious, costly, time consuming, and require the destruction of the tree. Terrestrial laser scanning (TLS) has increasingly been applied to recreate the architecture of trees to reduce the need for...
Cross‐Continental Analysis Shows That Disturbance Effects on Reptile Body Condition Do Not Predict Abundance ResponsesNARA Subscribed
Ecological disturbances are discrete events that alter or transform the physical, chemical, or biological characteristics of ecosystems. Disturbance can cause animal populations to decline and, according to the risk‐disturbance hypothesis and population collapse framework, these declines can be predicted by declines in animal body condition. However, no research has empirically examined the general relationship between body co...
Record High Temperatures in the Ocean in 2024NARA Subscribed
Heating in the ocean has continued in 2024 in response to increased greenhouse gas concentrations in the atmosphere, despite the transition from an El Niño to neutral conditions. In 2024, both global sea surface temperature (SST) and upper 2000 m ocean heat content (OHC) reached unprecedented highs in the historical record. The 0–2000 m OHC in 2024 exceeded that of 2023 by 16 ± 8 ZJ (1 Zetta Joules = 10 21 Joules, with a 95% c...