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Estimating Resilience Across Landscapes Ecology and Society
Peterson, Garry D; McGill University; garry.peterson@mcgill.ca.
Although ecological managers typically focus on managing local or regional landscapes, they often have little ability to control or predict many of the large-scale, long-term processes that drive changes within these landscapes. This lack of control has led some ecologists to argue that ecological management should aim to produce ecosystems that are resilient to change and surprise. Unfortunately, ecological resilience is difficult to measure or estimate in the landscapes people manage. In this paper, I extend system dynamics approaches to resilience and estimate resilience using complex landscape simulation models. I use this approach to evaluate cross-scale edge, a novel empirical method for estimating resilience based on landscape pattern. Cross-scale...
Tipo: Peer-Reviewed Reports Palavras-chave: Alternative stable states; Cross-scale edge; Eglin Air Force Base; Longleaf pine; Oak; Probabilistic resilience; Spatial resilience.
Ano: 2002
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Re-evaluation of Phytophthora citricola isolates from multiple woody hosts in Europe and North America reveals a new species, Phytophthora plurivora sp. nov Naturalis
Burgess, T. Jung, T.I..
During large-scale surveys for soilborne Phytophthora species in forests and semi-natural stands and nurseries in Europe during the last decade, homothallic Phytophthora isolates with paragynous antheridia, semipapillate persistent sporangia and a growth optimum around 25 °C which did not form catenulate hyphal swellings, were recovered from 39 host species in 16 families. Based on their morphological and physiological characters and the similarity of their ITS DNA sequences with P. citricola as designated on GenBank, these isolates were routinely identified as P. citricola. In this study DNA sequence data from the internal transcribed spacer regions (ITS1 and ITS2) and 5.8S gene of the rRNA operon, the mitochondrial cox1 and β-tubulin genes were used in...
Tipo: Article / Letter to the editor Palavras-chave: Beech; Citricola; Decline; Dieback; Forest; Multivora; Nursery; Oak; Phylogeny.
Ano: 2009 URL: http://www.repository.naturalis.nl/record/532257
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Traditional practice of leaf litter harvesting and utilization by farmers in west-central Bhutan: Paving the way for sustainable management Thai Agricultural
Rekha Chhetri; Banyong Toomsan; Wanwipa Kaewpradit; Viriya Limpinuntana.
Forest is an important resource for the farmers in soil fertility management and crop production in Bhutan. The tradition of leaf litter harvesting from the forests has been in practice since time immemorial. However, the continuous leaf litter harvesting has raised concerns on the sustainability of the leaf litter forests (Sokshing). There is a paucity of information about harvesting practices, utilization and management of forests. Hence, the presentstudy was aimed at generating information on how farmers perceive, utilize and manage leaf litter forests. Data were collected from two sub-districts Nahi and Limbukha in west-central Bhutan involving a total of forty farmers, using questionnaires and semi-structured interviews, focus group discussions and...
Tipo: Collection Palavras-chave: Forests; FYM; Oak; Pine needles; Soil fertility; โอ๊ค; สน; ป่าไม้; การบำรุงดิน; ปุ๋ยหมัก; การจัดการป่าไม้; ความอุดมสมบูรณ์ของดิน; เศษซากใบไม้; ภูฏาน.
Ano: 2012 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5339
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Effectiveness of both synthetic compounds and biological extracts against powdery mildew (Blumeria graminis f. sp. tritici) on winter wheat Agrociencia
Věchet,Lubomír; Šerá,Božena.
The objective of this study was to evaluate the effectiveness of foliar application of various synthetic compounds and biological extracts against powdery mildew on wheat. Seed coats of winter wheat were treated by synthetical compounds (benzothiadiazole, salicylic acid, and glycine betaine) or by the extracts from plants (oak, giant knotweed, curcuma, and ginger). Then the seeds were planted using small-field experiments with powdery mildew infection (repetitions over a two-year period; experimental field in Ruzyne, Prague). Leaf area infection was measured and the Cumulative Proportion of Leaf Area Diseased (CPLAD) was calculated. Data were analysed using ANOVA (Tukey test, p≤0.05). Effectiveness of preparations varied 30 % to 72 % in 2008, and 25 % to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biotechnology; Curcuma; Giant knotweed; Ginger; Infection; Oak.
Ano: 2015 URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952015000100006
Registros recuperados: 4
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