Treesearch

As the world contends with the far-ranging impacts of the COVID-19 pandemic, ongoing environmental crises have, to some extent, been neglected during the pandemic. One reason behind this shift in priorities is the scarcity mindset triggered by the pandemic. Scarcity is the feeling of having less than what is necessary, and it causes people to prioritize immediate short-term needs over long-term ones. Scarcity experienced in the pandemic can reduce the willingness to engage in pro-environmental behavior, leading to environmental degradation that increases the chance of future pandemics. To...

Floodplain forests provide valuable ecosystem services, yet human activity has degraded many of these riverine systems. Previous investigations of floodplain forest composition have frequently focused on flooding without incorporating successional dynamics; however, their restoration requires understanding both. We investigated floodplain forest composition along both flooding and succession gradients. River meandering builds new floodplain land with a variable microtopography and diverse levels of flood exposure. We compared vegetation to floodplain land ages on chronological sequences....

The use of indicator species can simplify bird monitoring by reducing the level of specialized skills needed, which increases the potential pool of participants and reduces training costs and complexity. To facilitate monitoring in the humid forests of northeast Central America, we conducted point count surveys for birds across gradients of disturbance in the Cockscomb Basin Wildlife Sanctuary, Belize, and analyzed the association of bird species with remotely sensed metrics of forest condition and anthropogenic disturbance using indicator species analysis. Twenty species exhibited...

Aims. Climate warming in northern ecosystems is triggering widespread permafrost thaw, during which deep soil nutrients, such as nitrogen, could become available for biological uptake. Permafrost thaw shift frozen organic matter to a saturated state, which could impede nutrient uptake. We assessed whether soil nitrogen can be accessed by the deep roots of vascular plants in thermokarst bogs, potentially allowing for increases in primary productivity. Methods. We conducted an ammonium uptake experiment on Carex aquatilis Wahlenb. roots excavated from thermokarst bogs in interior Alaska....

Urban ecology began as a biological science practised within cities. As such, it sought out forests, abandoned or undeveloped land, meadows and surface waters as analogues of the places outside of cities where ecologists had worked for decades. In 1997, the call for proposals by the National Science Foundation's Long-Term Ecological Research (LTER) programme for urban research sites required integration of biological and physical structures and processes with social structures and processes. The Baltimore Ecosystem Study, referred to as BES, was one of the two successful responses to that...

Whole-tree harvesting practices are often restricted on soils with intrinsically low soil nutrients. Delineating restricted soil components from nonrestricted components presents a challenge for forest practitioners working with glaciofluvial parent materials. We investigated a suite of biological and edaphic factors to assess if restricted soil components are functionally distinct from nonrestricted soil components in partially restricted soil complexes across northern Wisconsin, USA. This study tested repeatable methods for soil delineation based on soil particle size, varying in spatial...

Arid and semiarid ecosystems drive year-to-year variability in the strength of the terrestrial carbon (C) sink, yet there is uncertainty about how soil C gains and losses contribute to this variation. To address this knowledge gap, we embedded C-depleted soil mesocosms, containing litter or biocrust C inputs, within an in situ dryland ecosystem warming experiment. Over the course of one year, changes in microbial biomass and total soil organic C pools were monitored alongside hourly measurements of soil CO2 flux. We also developed a biogeochemical model to explore the mechanisms that gave...

Estrogenic hormones and organic ultraviolet-filters (UV-filters) have attracted increased attention as endocrine disrupting chemicals (EDCs) due to their potent estrogenicity and widespread occurrence in the environment. This study investigated the accumulation of three estrogenic hormones and five UV-filters in red swamp crayfish (Procambarus clarkii). Exposure experiments were conducted for 42 days with a mixture of EDCs at two environmentally-relevant design concentrations (i.e., 500 and 5000 ng L−1). The aqueous-phase EDC concentrations decreased over time and were re-established every...

Dams fragment the longitudinal flux of sediment and obstruct fish passage. To help remediate these impacts, dam removal has become an important tool in the river restoration toolkit. Scientifically, these removals also provide an important experimental design, fixed in time and space, to quantify geomorphic and ecological responses to removal of a disturbance. Using the removal of a 6 m high dam in Massachusetts (USA), we quantify the immediate and subsequent channel and ecological recovery to test whether the immediate ecological/geomorphic responses were sustained or transient. Initial...

Climate change adaptation requires that we anticipate future conditions that may deviate from our historical experiences. Our ability to do so is associated with the perceived proximity of decision-outcomes. Through analysis of semi-structured interviews with farmers in the northeastern United States, we conclude that temporal distance (now versus later) and social distance (self versus other) of climate impacts interact to play important roles in climate risk perception. Using Psychological Distance and Construal Level Theory, we identified two distinct temporal perspectives, historically...