A5001983257- Marine and fisheries research
- Marine Bivalve and Aquaculture Studies
- Marine and coastal plant biology
- Marine Biology and Ecology Research
- Fish Ecology and Management Studies
- Ocean Acidification Effects and Responses
- Coral and Marine Ecosystems Studies
- Coastal wetland ecosystem dynamics
- Isotope Analysis in Ecology
- Cephalopods and Marine Biology
- Coastal and Marine Management
- Food Industry and Aquatic Biology
- Peatlands and Wetlands Ecology
- Environmental DNA in Biodiversity Studies
- Crustacean biology and ecology
- Marine animal studies overview
- Ecology and Vegetation Dynamics Studies
- Identification and Quantification in Food
- Water Quality and Resources Studies
- Atmospheric and Environmental Gas Dynamics
- Forest Ecology and Biodiversity Studies
- Oceanographic and Atmospheric Processes
- Echinoderm biology and ecology
- Genetic diversity and population structure
- Cardiac, Anesthesia and Surgical Outcomes
University of California, Davis
2014-2024
California Department of Fish and Wildlife
2014-2024
Bay Institute
2001-2023
Mote Marine Laboratory
2003-2016
Virginia Tech
2010
NOAA National Marine Fisheries Service Southwest Fisheries Science Center
2010
University of California, Santa Cruz
2001
Abstract Extreme climatic events have recently impacted marine ecosystems around the world, including foundation species such as corals and kelps. Here, we describe rapid climate-driven catastrophic shift in 2014 from a previously robust kelp forest to unproductive large scale urchin barrens northern California. Bull canopy was reduced by >90% along more than 350 km of coastline. Twenty years ecosystem surveys reveal timing magnitude events, mass mortalities sea stars (2013-), intense...
Abstract Climate change is responsible for increased frequency, intensity, and duration of extreme events, such as marine heatwaves (MHWs). Within eastern boundary current systems, MHWs have profound impacts on temperature-nutrient dynamics that drive primary productivity. Bull kelp ( Nereocystis luetkeana ) forests, a vital nearshore habitat, experienced unprecedented losses along 350 km coastline in northern California beginning 2014 continuing through 2019. These had devastating...
The prevalence of disease-driven mass mortality events is increasing, but our understanding spatial variation in their magnitude, timing and triggers are often poorly resolved. Here, we use a novel range-wide dataset comprised 48 810 surveys to quantify how sea star wasting disease affected Pycnopodia helianthoides , the sunflower star, across its range from Baja California, Mexico Aleutian Islands, USA. We found that outbreak occurred more rapidly, killed greater percentage population left...
Red sea urchins (Strongylocentrotus franciscanus), residing in shallow habitats Bodega Bay, California are morphologically distinct and possibly enhance recruitment by spawning larvae sheltering juveniles. This suggests beds of would be ideal candidates for harvest refugia promoting the production to replenish deeper harvested habitats. from (5 m) had significantly heavier gonads (63 ± 30 g, N = 45, mean 1 SD) compared with intermediate (14 deep (23 (12 8 39, SD). Gonad indices spring,...
Mass mortalities in natural populations, particularly those that leave few survivors over large spatial areas, may cause long-term ecological perturbations. Yet mass remain undocumented or poorly described due to challenges responding rapidly unforeseen events, scarcity of baseline data, and difficulties quantifying rare patchily distributed species, especially remote marine systems. Better chronicling the geographic pattern intensity is critical face global changes predicted alter regional...
Ocean acidification (OA) poses a major threat to marine ecosystems and shellfish aquaculture. A promising mitigation strategy is the identification breeding of varieties exhibiting resilience stress. We experimentally compared effects OA on two populations red abalone (Haliotis rufescens), mollusc important fisheries global Results from our experiments simulating captive aquaculture conditions demonstrated that sourced strong upwelling region were tolerant ongoing OA, whereas captive-raised...
Changes in ocean temperature can have direct and indirect effects on the population dynamics of marine invertebrates. We examined impacts warm water, starvation, disease reproduction red abalone (Haliotis rufescens). found that sperm production was highly sensitive to water suggesting there may be a dramatic threshold above which fails. Wild males from northern (72%) southern (81%) California had sperm. In contrast, only 30% exposed (18°C) for 6 mo or starvation 13 sperm, with...
Declining oxygen is one of the most drastic changes in ocean, and this trend expected to worsen under future climate change scenarios. Spatial variability dissolved dynamics hypoxia exposures can drive differences vulnerabilities coastal ecosystems resources, but documentation at regional scales rare open-coast systems. Using a collaborative network temperature sensors maintained by scientists fishing cooperatives from California, USA, Baja Mexico, we characterize spatial temporal seawater...
We estimate annual growth and mortality of red abalone, Haliotis rufescens, in northern California using tag recapture data applied to multiple models. investigate seven models the form, L t 1 = Lt f(Lt ) where is shell length at tagging (time t), 1, one year later, function a model change ΔL. Abalone are drawn from broad range sizes (shell lengths 5–222 mm) tagged recaptured later (n 231) Point Cabrillo Reserve California. present results for models, rank fit (using sum squared residuals)...
A restoration program including wild population surveys, captive breeding, health monitoring, recovery site preparation, and modeling has been implemented to restore white abalone (Haliotis sorenseni) populations in California. White once supported a lucrative fishery are now endangered, nearing extinction at less than 1% of baseline abundances. Recent deep water surveys indicate that continue decline with no signs recruitment, despite the closure 1996. Four sites artificial reefs...
Ocean acidification (OA) increasingly threatens marine systems, and is especially harmful to calcifying organisms. One important question whether OA will alter species interactions. Crustose coralline algae (CCA) provide space chemical cues for larval settlement. CCA have shown strongly negative responses in previous studies, including disruption of settlement corals. In California, seven harvested, threatened, endangered abalone. We exposed four common genera a crustose red algae,...
Abstract: Marine protected areas ( MPAs) designed to provide harvest refugia for red sea urchins Strongylocentrotus franciscanus ) offer a unique opportunity study the indirect effects of urchin fishing on subtidal communities. Sea may important cryptic microhabitat juvenile abalone sheltering beneath spines in shallow habitats worldwide. We investigated abundance (3–90 mm) abalone, Haliotis rufescens and rare flat <90 H. walallensis fished rocky reefs California. Abalone surveys were...
Prospective elasticity analyses have been used to aid in the management of fished species and conservation endangered species. Elasticities were examined for deterministic size-based matrix models red abalone, Haliotis rufescens, white H. sorenseni, evaluate which size classes influenced population growth (λ) most. In abalone matrix, transitions determined from a tag recapture study grouped into nine classes. was laboratory five Survivorship estimated data using Jolly-Seber model with as...
Understanding spatial and temporal patterns in the recruitment of marine invertebrates with complex life histories remains a critical knowledge gap ecology fisheries. As are facing multiple stressors from overfishing climatic stress, it is important to evaluate conditions that facilitate low-density populations. The red abalone Haliotis rufescens historically supported an economically fishery California, but was sequentially closed as stocks declined, last fished area 2018 following collapse...
Marine ecosystems are vulnerable to climate driven events such as marine heatwaves yet we have a poor understanding of whether they will collapse or recover. Kelp forests known be susceptible, and there has been rise in sea urchin barrens around the world. When temperatures increase so do physiological demands while food resources decline, tightening metabolic constraints. In this case study, examine red abalone ( Haliotis rufescens ) looking at sublethal impacts their prospects for recovery...
The recent large-scale intensification of marine heatwaves, and other climate-related stressors, has dramatically impacted biogenic habitats around the globe, including ecosystems such as coral reefs, seagrasses, kelp forests. While impacts to foundation species may be particular concern, these ecological catastrophes underscore need examine how whole systems respond a suite stressors. climate-driven collapse bull forest recreational red abalone fishery in northern California provides an...