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 13 of 13 for “"active restoration"”.
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Belowground success: Collembola as indicators of restoration progress following active and passive restoration
… by human land uses and exploitation, ecological restoration is an increasingly essential topic in the field of conservation. In South Africa, a predominantly semi-arid country, invasive tree species negatively impact the limited water resources by reducing runoff and disrupting water related …
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Revegetation of two drained reservoirs on the Elwha River ten years after dam removal
… walls, terraces of reservoir sediment, and active riparian zones) were important predictors of revegetation patterns. The goal of my study was to extend this timeframe to assess revegetation patterns in the first ten years following dam removal. First, I examined the natural revegetation of …
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Viðbrögð virknihópa plantna viðáburðargjöf ogútilokun beitar á íslenska hálendinu
… state, with little chance of recovery unless active restoration measures are implemented. In this study, I use plant community data from a field experiment to examine the effects of two management practices, grazing exclusion and fertilization, on the cover of different plant functional groups …
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The endangered European native oyster Ostrea edulis (L) and creation of Marine Conservation Zones: a win – win scenario for fisheries and conservation?
… O. edulis populations were all located within actively managed harvesting areas. The study also found low concentrations of larvae in the water column during the breeding season (May – October) suggesting that veliger production is limited which may prevent recovery of populations. In 2013, the …
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Testing assisted gene flow in restoration of winterfat, Krascheninnikovia lanata, a Great Basin desert shrub
… and density of native plant communities, active restoration is used to restore landscapes, and increasingly, practitioners are considering the use of non-local seeds from warmer or drier locations in restoration. Here, focusing on the Great Basin and Mojave deserts, we focused on …
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Effect of land degradation on the above-ground vegetation and soil seed bank of a Rangeland in Kunene region Namibia
… for natural regeneration and the need for active restoration efforts. This study assessed and compared the characteristics of the aboveground vegetation and soil seed bank at sites of varying degrees of degradation in the Kunene Region of Namibia. A total of three sites were identified per …
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Vegetation community development after dam removal on the Elwha River
… The National Park Service study includes actively restored areas in the reservoirs, and data collection in both studies was concurrent, but used different methods. Here, I hypothesized that actively restored areas would have the greatest native species richness. The vegetation communities …
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Comparing activity restriction and habitat creation approaches in Marine Protected Areas (MPAs): a Bayesian belief network model approach
… socioeconomic trade-offs within MPAs. Through actively restoring existing habitats or introducing low trophic-level aquaculture as novel habitat, benefits to associated marine life can create increased fish stocks and tourism opportunities, with benefit to local economies. Using complex system …
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The Peninsula Shale Renosterveld of Devil's Peak: phytosociology, system drivers and restoration potential
… value of this highly threatened vegetation type, restoration is required. However, as many restoration projects fail as a result of a poor understanding of the ecosystem dynamics in which they are operating in, it is imperative that prior to initiation data is collected from the site. To enhance …
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The effects of replanting and restoration of riparian buffers on arthropods in oil palm systems
… far from riparian buffers undergoing different restoration management, in order to investigate the effects of replanting and restoration of riparian buffers on arthropod biodiversity. This thesis has four data chapters: Chapter 2: By surveying arthropods across an oil palm chronosequence that …
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Herbaceous and woody plant establishment across hydrologic gradients in bottomland reforestation sites
… in a restored floodplain and, ultimately, restoration outcomes are likely constrained by the site’s hydrologic regime, along with other abiotic factors including light availability and the distance from potential colonization sources. However, trees are often planted in restorations without …
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Biodiversity-ecosystem service relationships in degraded and recovering ecosystems.
… rates? 7. Which areas are priorities for restoration of tropical carbon? All chapters in this thesis make use of large datasets that I collated from the literature and other authors in order to draw broad conclusions about trade-offs and relationships between services and biodiversity In …
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Using ecological concepts to restore the drylands of Namaqualand, South Africa
… cultivation, and the efficiency of passive and active restoration of fallow fields, in Namaqualand's Hardeveld and Renosterveld vegetation communities. The core theory of this thesis lies in the ecology of semi-arid environments and the concept of patch dynamics. In such areas plants grow …