Charles van Rees

Charles van Rees
University of Georgia | UGA · River Basin Center

Ph.D in Ecology Behavior and Evolution (Tufts University)

About

42
Publications
7,907
Reads
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227
Citations
Additional affiliations
September 2018 - present
Estación Biológica de Doñana
Position
  • PostDoc Position
Description
  • Fulbright Postdoctoral fellowship, investigating effects of flooding and land management on the space use and behavior of waterbirds in Andalusian rice fields.
January 2017 - June 2017
Center for Large Landscape Conservation
Position
  • Researcher
Description
  • Aquatic ecosystem specialist, and stakeholder consultation organizer for Cross-Realm conservation project in the Missouri Headwaters Basin
August 2012 - May 2018
Tufts University
Position
  • PhD Student

Publications

Publications (42)
Article
Full-text available
In addition to changes associated with climate and land use, parrots are threatened by hunting and capture for the pet trade, making them one of the most at-risk orders of birds for which conservation action is especially important. Species richness is often used to identify high-priority areas for conserving biodiversity. By definition, richness c...
Article
Full-text available
Invasive alien species (IAS) are a rising threat to biodiversity, national security, and regional economies, with impacts in the hundreds of billions of U.S. dollars annually. Proactive or predictive approaches guided by scientific knowledge are essential to keeping pace with growing impacts of invasions under climate change. Although the rapid dev...
Article
Full-text available
Natural infrastructure (NI) development, including ecosystem restoration, is an increasingly popular approach to leverage ecosystem services for sustainable development, climate resilience, and biodiversity conservation goals. Although implementation and planning for these tools is accelerating, there is a critical need for effective post-implement...
Article
Full-text available
Smartphone apps have enhanced the potential for monitoring of invasive alien species (IAS) through citizen science. They now have the capacity to massively increase the volume and spatiotemporal coverage of IAS occurrence data accrued in centralised databases. While more reporting apps are developed each year, innovation across diverse functionalit...
Article
Full-text available
Biological invasions are accelerating worldwide, causing major ecological and economic impacts in aquatic ecosystems. The urgent decision-making needs of invasive species managers can be better met by the integration of biodiversity big data with large-domain models and data-driven products. Remotely sensed data products can be combined with existi...
Article
Full-text available
The rapidly emerging field of macrogenetics focuses on analysing publicly accessible genetic datasets from thousands of species to explore large-scale patterns and predictors of intraspecific genetic variation. Facilitated by advances in evolutionary biology, technology, data infrastructure, statistics and open science, macrogenetics addresses core...
Article
Full-text available
Millette et al. (Ecology Letters, 2020, 23:55–67) reported no consistent worldwide anthropogenic effects on animal genetic diversity using repurposed mitochondrial DNA sequences. We reexamine data from this study, describe genetic marker and scale limitations which might lead to misinterpretations with conservation implications, and provide advice...
Preprint
Full-text available
Global change creates an urgent need to predict spatial responses of biota to support the conservation of sufficient habitat to maintain biodiversity. We present species distribution model theory and a synthesis of avian literature on approaches to collecting occurrence data, selecting explanatory variables and analytical processes currently in use...
Article
Research on the space use and behaviour of waterbirds yields important insights on human‐wildlife interactions of ecological and societal importance under global change. The extent to which dynamic (within‐season) changes in anthropogenic landscapes affect these interactions is poorly understood. Lesser Black‐backed Gulls (Larus fuscus) are promine...
Article
Full-text available
The study of island subspecies provides excellent “natural experiments” for examining the impacts of different selective regimes on animal taxa. We examined the morphological differences between the Hawaiian and continental North American subspecies of the Common Gallinule (Gallinula galeata sandvicensis and G. g. cachinnans, respectively), for whi...
Preprint
Full-text available
Millette et al. (Ecology Letters, 2020, 23:55-67) reported no consistent worldwide anthropogenic effects on animal genetic diversity using repurposed mitochondrial sequences. We describe limitations to this study, some of which are common to other macrogenetic studies, that may lead to misinterpretations and unintended consequences for conservation...
Article
Full-text available
Plans are currently being drafted for the next decade of action on biodiversity— both the post-2020 Global Biodiversity Framework of the Convention on Biological Diversity (CBD) and Biodiversity Strategy of the European Union (EU). Freshwater biodiversity is disproportionately threatened and underprioritized relative to the marine and terrestrial b...
Article
Full-text available
Physiological metrics are becoming popular tools for assessing individual condition and population health to inform wildlife management and conservation decisions. Corticosterone assays can provide information on how animals cope with individual and habitat-level stressors, and the recent development of feather assays is an exciting innovation that...
Preprint
Full-text available
Background: Research on the space use and behavior of waterbirds—as highly mobile of wetland habitats—yields important insights on human-wildlife interactions of ecological and societal importance under global change. The extent to which dynamic (within-season) changes in anthropogenic landscapes affects these interactions is poorly understood. Les...
Article
Full-text available
Hawaiian stilts (Himantopus mexicanus knudseni) are an endangered subspecies of the Black‐necked stilt endemic to the Hawaiian Islands. Despite long‐term study, the main drivers of Hawaiian stilt population dynamics are poorly understood. We tested for density dependence using two sources of evidence: a 30‐year time series of annual estimated range...
Preprint
Full-text available
The drafting of a new Global Biodiversity Framework for the Convention on Biological Diversity (CBD) and Biodiversity Strategy for the European Union (EU) render 2020 a critical crossroad for biodiversity conservation. Freshwater biodiversity is disproportionately threatened and poorly studied relative to marine and terrestrial biota, despite provi...
Chapter
Growing awareness of the impacts of hydrological perturbations on freshwater life and the role of ecological systems in water security has led to the prioritization of ecological factors in water management. This chapter addresses the critical role of ecological systems in water management, focusing on the conflicts and synergies between freshwater...
Article
Full-text available
Water security is essential for human well‐being and is among the biggest challenges in environmental governance. Governments and nonprofit organizations alike are gaining increased appreciation for the contributions of intact ecosystems to water security, whereas conservation scientists call for decisive action to address the dire condition of ear...
Article
Full-text available
The smooth-billed ani (Crotophaga ani) is a widespread introduced bird species in the biologically important archipelago of Galápagos. Many scientists and local people consider it to be a damaging invasive, and it is possible that it impacts native species and ecosystems via multiple mechanisms. However, evidence for this is largely anecdotal and r...
Article
Full-text available
Wetlands represent a unique and important part of Hawai‘ i’s ecological and cultural history, mediating the interactions of terrestrial and marine ecosystems and providing diverse food and other resources to traditional societies. Wetland loss and degradation on the Hawaiian Islands have been severe since European colonization and subsequent landsc...
Article
Full-text available
Both terrestrial and freshwater aquatic management practices contribute to maintaining a healthy, connected landscape, yet these two ecological realms are often managed independently rather than as intertwined components of a single system. Cross-realm management, which explicitly considers the connections between terrestrial and aquatic realms, is...
Article
Full-text available
Anthropogenic alterations to landscape structure and composition can have significant impacts on biodiversity, potentially leading to species extinctions. Population‐level impacts of landscape change are mediated by animal behaviors, in particular dispersal behavior. Little is known about the dispersal habits of rails (Rallidae) due to their crypti...
Article
Full-text available
We conducted a spatially explicit, stochastic, individually based population viability analysis for the Hawaiian common gallinule (Gallinula galeata sandvicensis), an endangered subspecies of waterbird endemic to fragmented coastal wetlands in Hawai'i. This subspecies persists on two islands, with no apparent movement between them. We assessed exti...
Data
Perturbation analysis examining the sensitivity of extirpation probability among Hawaiian gallinule populations on O’ahu to mean brood size Points indicate parameter values tested. Results are shown for the overall population (top) and 5 subpopulations.
Data
Spatial representation of potential Hawaiian gallinule habitat loss due to sea level rise over 80 and 160 year time scales at the Windward wetland complex on O’ahu Light gray areas indicate current Hawaiian gallinule habitat, dark gray indicates seawater. Black areas indicate habitat lost due to seawater inundation. ∼6% of habitat in the Windward c...
Data
Perturbation analysis examining the sensitivity of extirpation probability among Hawaiian gallinule populations on O’ahu to varying proportions of females in the breeding pool Points represent parameter values tested. Results are shown for the overall population (top) and 5 subpopulations.
Data
Count data of Hawaiian gallinules from playback surveys during Summer 2017 Each line represents the results of counts taken using the playback method of DesRochers, Gee & Reed (2008) at a particular pond in each wetland complex. Totals for individual wetlands and individual wetland complexes are presented. Each count was carried out using 1 minute...
Data
Spatial representation of potential Hawaiian gallinule habitat loss due to sea level rise over 80 and 160 year time scales at the Pearl Harbor wetland complex on O’ahu Light gray areas indicate current Hawaiian gallinule habitat, dark gray indicates seawater. Black areas indicate habitat lost due to seawater inundation. ∼‘0% of habitat in the Pearl...
Data
Spatial representation of potential Hawaiian gallinule habitat loss due to sea level rise over 80 and 160 year time scales at Turtle Bay resorts on O’ahu. 160 years) Light gray areas indicate current Hawaiian gallinule habitat, dark gray indicates seawater. Black areas indicate habitat lost due to seawater inundation. No habitat in Turtle Bay is lo...
Data
Raw data and code for Hawaiian gallinule PVA A zipped folder containing raw data, Excel spreadsheet calculations, R code, and Vortex outputs used in preparing input data and analyzing outputs of Hawaiian gallinule population viability model implemented in Vortex.
Article
Full-text available
Vital rates describe the demographic traits of organisms and are an essential resource for wildlife managers to assess local resource conditions and to set objectives for and evaluate management actions. Endangered waterbirds on the Hawaiian Islands have been managed intensively at state and federal refuges since the 1970s, but with little quantita...
Article
Full-text available
The effects of anthropogenic landscape change on genetic population structure are well studied, but the temporal and spatial scales at which genetic structure can develop, especially in taxa with high dispersal capabilities like birds, are less well understood. We investigated population structure in the Hawaiian gallinule (Gallinula galeata sandvi...
Poster
Contributing to conservation and management of endangered Hawaiian waterbirds by identifying important wetlands, flight pathways, and critical dispersal barriers that influence the overall population connectivity and extinction risk of three endemic Hawaiian waterbirds. This information will promote stewardship by allowing landowners to work cooper...
Article
Full-text available
Contemporary water management strategies call for the inclusion of ecological research in the decision-making process and emphasize environmentally sustainable management solutions. Most ecological information used in water management shares two problematic characteristics; 1) simplistic, phenomenological approaches and aggregated data that may not...
Article
Full-text available
Wetland inventories are essential to understanding human effects on wetland distributions, estimating rates of wetland loss and setting recovery goals for endangered species. Wetlands in the Hawaiian archipelago (U.S.A.) support human water demands for agriculture, a rapidly expanding urban population, and 222 federally listed threatened or endange...

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Projects

Projects (4)
Project
21st century water management problems require integrated and interdisciplinary solutions drawing on the expertise of a variety of professionals from multifarious training backgrounds and sectors. Interdisciplinary water management frameworks like IWRM and Water Diplomacy that have been designed to tackle complex water problems may limit the scope and contribution of ecological information in water management decision making, or have little to no formalized guidance on how ecological information is best included. This project focuses on the development of a new framework for integrating ecological phenomena into water management scenarios using the increasingly popular stakeholder concept and a mutual gains approach.
Project
Integrating population genetics, landscape genetics, radio telemetry, and mark-resight studies to understand the impacts of anthropogenic landscape change on the movement behavior and population structure of an endangered Hawaiian waterbird. Comparing commonly used field methods for estimating movement, and statistical methods for estimating functional and structural population connectivity.
Archived project
To generate a decision-support tool for general use in river watersheds of the Western U.S. for implementing water or land management techniques that simultaneously benefit terrestrial and aquatic ecosystems and their associated processes and services.