Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"Ecosystem recovery"”.
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Geochemical changes, plant growth and ecosystem recovery in soils after high temperature remediation
Thermal and smouldering remediation can effectively remove toxic organic compounds from contaminated sites, opening them up for re-development or environmental enrichment. However, these treatments generate elevated temperatures in the soil (40-1200°C) that may impact its quality, particularly its …
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Evaluating recovery in aquatic production in the Bay of Quinte: A perspective based on changes in sedimentary diatom assemblages
… activities and chosen for immediate recovery plans. One of the AOCs is the Bay of Quinte, an inlet of Lake Ontario. Although remediation efforts started in the Bay of Quinte in the early 1980s, the structure and function of this ecosystem remains impaired from excess nutrients, toxic …
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Effects of 11 Years of CO2 Enrichment on Root Biomass and Spatial Distribution in a Florida Scrub-Oak Ecosystem
<p>A Florida (USA) scrub-oak ecosystem was exposed to elevated atmospheric CO<sub>2</sub> in open-top chambers from 1996-2007. Minirhizotrons and ground-penetrating radar (GPR) were used to measure fine root (< 2 mm diameter) and coarse root (> 5 mm diameter) biomass, respectively. After 11 years …
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Nitrogen release, tree uptake, and ecosystem retention in a mid-rotation loblolly pine plantation following fertilization with 15N-enriched enhanced efficiency fertilizers
… spike in NH4+ 49 days after fertilization. Total ecosystem recovery of fertilizer in each treatment was; MC NBPT urea, 51.29 g N; NBPT urea, 48.87 g N; urea, 45.09 g N; and PC urea, 31.30 g N which represents 78.7%, 74.7%, 72.1%, and 47.6% respectively of the total N applied. For the MC NBPT urea, …
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Collaboration within the Puget Sound Marine and Nearshore Scientific Community
Scientific research is essential to supporting ecosystem recovery efforts. Given limited time and financial resources, funding entities may be interested in factors that influence the `impact' of research findings on recovery processes. This analysis explores one characteristic of scientific …
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Assessing the Effectiveness of Forest Restoration Efforts in Malawi: A Systematic Review of Successes, Challenges and Lessons Learned
… global environmental challenge affecting various ecosystems, with forest ecosystems among the most severely affected. In Malawi, forest degradation has been driven by a complex interplay of socioeconomic and ecological factors, including agricultural expansion, charcoal production, and weak …
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Mapping Elaeagnus Umbellata on Coal Surface Mines using Multitemporal Landsat Imagery
… information on mined lands' vegetative cover and ecosystem recovery status is necessary for implementation of effective environmental management practices. The invasive autumn olive (Elaeagnus umbellata) is abundant on former coal surface mines, often outcompeting native trees due to its faster …
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Lake Sediment-Based Reconstructions of Late-Holocene Lowland Environments of Dominican Republic and Barbuda, Northern Caribbean
… landfalls at the study site with longer ecosystem recovery times and decreased fire activity versus during earlier, more moist periods of the late-Holocene. At Freshwater Pond, an inland pond on Barbuda, we interpreted vegetation disturbance from presence of disturbance pollen taxa and …
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Investigating the efficiency of reforestation approaches in restoring rainforest biodiversity and function
… functions and increase the provision of ecosystem services in tropical forests. Effective assessment of the success of ecological restoration projects is critical in justifying the use of restoration, as well as improving best practice. However, there is often the assumption that once a …
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Foraging for a foothold: Causes and consequences of dietary variation in a threatened avian pollinator
… it may have for individuals, populations, and ecosystems. This information may be particularly important for species that are threatened due to food limitation, as dietary variation could be used to inform conservation efforts. In this thesis, I used the hihi (Notiomystis cincta), a threatened …
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Patterns, Processes And Models Of Microbial Recovery In A Chronosequence Following Reforestation Of Reclaimed Mine Soils
… play essential roles in biogeochemical cycling. Ecosystem disturbances such as surface mining significantly alter soil microbial communities, which could lead to changes or impairment of ecosystem functions. Reforestation procedures were designed to accelerate the reestablishment of plant …
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Tīmata whakaora, kickstarting recovery - Using bivalves to bioremediate degraded estuarine sediments
Estuarine soft sediment ecosystems worldwide are increasingly threatened by anthropogenic, land-derived and marine stressors that compromise their health and functionality with cascading effects on ecosystem services that they provide. Once degraded, natural recovery can take years due to the loss …
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A new perspective of environmental stress in heterogeneously contaminated landscapesbeyond the individual effect
… of contaminants on organisms and to support ecosystem protection, Environmental Risk Assessment (ERA) has traditionally relied on forced exposure approaches, in which organisms are continuously exposed to contaminants. While useful, this method overlooks the connectivity among habitats and …