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Registros recuperados: 43 | |
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Blumenthal, Dana M; University of Minnesota; dblumenthal@npa.ars.usda.gov; Jordan, Nicholas R; University of Minnesota; perr0128@tc.umn.edu; Svenson, Elizabeth L; University of Minnesota; esvenso1@swarthmore.edu. |
The potential weed control benefits of ecological restoration are rarely cited and largely unstudied. Nevertheless, the nature of many restoration target communities, i.e., diverse, late-successional communities, suggests that restoration may control weeds and that the invasibility of plant communities may decrease with both diversity and successional age. Given the high cost of weed control in nonagricultural land, weed control benefits could be a strong incentive for restoration efforts. We examined the cumulative effects of restoration on weed populations 7 yr after tallgrass prairie restoration on a Minnesota sand plain. The numbers and biomass of volunteer weeds were compared among randomized plots with (1) no restoration, (2) prairie seed addition,... |
Tipo: Peer-Reviewed Reports |
Palavras-chave: Community invasibility; Invasion; Prairie; Restoration; Succession; Weed competition; Weed control; Weeds. |
Ano: 2003 |
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Fath, Brian D; Advanced Systems Analysis, International Institute for Applied Systems Analysis; Department of Biological Sciences, Towson University; bfath@towson.edu; Dean, Carly A; Advanced Systems Analysis, International Institute for Applied Systems Analysis; carly.ann.dean@gmail.com; Katzmair, Harald; FAS.research; harald.katzmair@fas.at. |
The concept of resilience continues to crescendo since the 1990s, touching on multiple fields with multiple interpretations and uses. Here, we start from its origins in systems ecology, framing the resilience concept explicitly in the adaptive cycle with the observation that resilient systems are ones that successfully navigate all stages of growth, development, collapse, and reorientation of this cycle. The model is explored in terms of the traps and pathologies that hinder this successful navigation, particularly when applied to socioeconomic organizations and decision-management situations. For example, for continuous function over the adaptive life cycle, a system needs activation energy or resources to grow, followed by adequate structure and... |
Tipo: Peer-Reviewed Insight |
Palavras-chave: Adaptive cycle; Collapse; Development; Growth; Re-orientation; Resilience; Succession; Thresholds. |
Ano: 2015 |
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Dubois, Stanislas; Derian, Francois; Caisey, Xavier; Rigolet, Carinne; Caprais, Jean-claude; Thiebaut, Eric. |
We used existing bathymetric data to study the macrofauna of a geophysical pockmark field restricted to a benthic habitat engineered by the tubiculous amphipod Haploops nirae in South Brittany (France). Stations inside and outside pockmarks of different morphometric characteristics (location, size, depression depth) were sampled for macrofauna and environmental parameters (sediment characteristics, organic matter, chl a, hydrogen sulfide and methane concentrations). Diversity indices showed higher species richness inside pockmarks, especially for species with medium to high abundances. Most sediment cores showed low methane but high hydrogen sulfide concentrations. We hypothesised that after eruption, the remaining residual methane from pockmark sediments... |
Tipo: Text |
Palavras-chave: Benthic habitat; Biodiversity; Succession; Amphipod; Haploops; South Brittany; Sulfide; Methane; Environmental factors. |
Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00272/38333/36576.pdf |
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Genitsaris, Savvas; Monchy, Sebastien; Viscogliosi, Eric; Sime-ngando, Telesphore; Ferreira, Stephanie; Christaki, Urania. |
Previous microscopy-based studies in the eastern English Channel have revealed it to be a productive meso-eutrophic coastal ecosystem, characterized by strong repeating patterns in microplankton succession. The present study examines the seasonal structure of the entire protistan community from March 2011 to July 2013, using tag pyrosequencing of the V2-V3 hypervariable region of the 18S rRNA gene. A total of 1242 OTUs and 28 high-level taxonomic groups, which included previously undetected taxa in the area, were identified. The detected OTUs were considered according to taxon-specific traits, which included their trophic role, abundance and specialization level. Taxa differentiation based on specialization level rather than abundance was more informative... |
Tipo: Text |
Palavras-chave: Unicellular eukaryotes; Tag pyrosequencing; 18S rRNA gene; Succession; Generalists; Specialists. |
Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00373/48454/48738.pdf |
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Nurtjahya, E.; Setiadi, D.; Guhardja, E.; Muhadiono; Setiadi, Y.. |
A quantitative study of floristic composition and vegetation structure was conducted at Bangka Island, Indonesia. Six different vegetation types were chosen, riparian forest, abandoned farmland, and natural regeneration of tin-mined lands of different ages: 0 and barren, 7, 11 and 38 years’ old tin-mined land. The seedling composition of the oldest tin-mined land was less than 2 % similar to that of a riparian forest. Natural regeneration on 7-year old tin-mined land began with herb species belonging to Cyperaceae, Poaceae, and Melastomaceae; followed by herb species belonging to Asteraceae and Poaceae on 11-year old; then by Poaceae and shrub species of Myrtaceae on 38-year old tin-mined land. Older tin-mined land tended to have less sand, higher... |
Tipo: Article / Letter to the editor |
Palavras-chave: Bangka; Succession; Tin-mined land. |
Ano: 2009 |
URL: http://www.repository.naturalis.nl/record/524986 |
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Spanevello, Rosani Marisa; Lago, Adriano. |
A problemática em torno da continuidade da agricultura familiar, expressa pela sucessão ou falta de sucessão do agricultor, reflete-se no encaminhamento da herança. É a permanência de pelo menos um dos filhos e a vontade de herdar o patrimônio familiar que garante a continuidade dos estabelecimentos. Estudos recentes mostram a falta de desejo dos filhos em suceder seus pais, especialmente às filhas. Assim, muitos estabelecimentos poderão não ter sucessor e conseqüentemente, inviabilizar a continuidade do mesmo, pois os pais não terão para quem deixar suas terras. Nesse sentido, é necessário entender como os agricultores estão procedendo o encaminhamento da herança, diante da possibilidade de ter ou não sucessores. Para tanto, alguns questionamentos guiam a... |
Tipo: Conference Paper or Presentation |
Palavras-chave: Herança; Sucessão; Agricultura familiar; Reprodução social; Heritage; Succession; Familiar agriculture; Social reproduction; Farm Management. |
Ano: 2008 |
URL: http://purl.umn.edu/113182 |
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Remble, Amber A.; Keeney, Roman; Marshall, Maria I.. |
This study identifies factors that influence primacy between generations in the management structure of U.S. family farms. The paper fills an important gap in the farm succession literature by exploring succession (in management of the farm) as an incremental process. Estimation with cross-sectional data from the USDAERS’ Agricultural Resource Management Survey (ARMS) and a limited dependent variable model is used to explain the decision for older generation operators to retain primary farm management duties with a junior operator serving a secondary role. We identify a number of statistically significant attributes that explain variation in the elder farmer’s role (primary versus secondary) in management of the farm. Our results suggest that transferring... |
Tipo: Conference Paper or Presentation |
Palavras-chave: Farm Household; Succession; Farm Management. |
Ano: 2010 |
URL: http://purl.umn.edu/56513 |
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Panunzi, Fausto; Ellul, Andrew; Pagano, Marco. |
Entrepreneurs may be constrained by the law to bequeath a minimal stake to non-controlling heirs. The size of this stake can reduce investment in family firms, by reducing the future income they can pledge to external financiers. Using a purpose-built indicator of the permissiveness of inheritance law and data for 10,245 firms from 32 countries over the 1990-2006 interval, we find that stricter inheritance law is associated with lower investment in family firms, while it leaves investment unaffected in non-family firms. Moreover, as predicted by the model, inheritance law affects investment only in family firms that experience a succession. |
Tipo: Working or Discussion Paper |
Palavras-chave: Succession; Family Firms; Inheritance Law; Growth; Investment; Financial Economics; G32. |
Ano: 2009 |
URL: http://purl.umn.edu/50330 |
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Corsi, Alessandro. |
The succession in family farm is a critical issue: it not only involves the transmission of wealth, but also of specific skills and of specific farm management techniques. Since a large share of farmers in Italy are old, the lack of prospective successors in their farms would imply that a change in the farm management will take place. In some cases this might lead to the abandonment of farms and to degradation of the territory. It is therefore important to explore the conditions under which a farm household can transmit the farm management within the household itself. In our paper we try to assess which are the determinants of the likely farm succession within the family and we test in a developed country the hypothesis put forward by Rosenzweig and Wolpin... |
Tipo: Conference Paper or Presentation |
Palavras-chave: Farm household; Succession; Farm specific knowledge; Probit model; Farm Management; J43; Q12. |
Ano: 2006 |
URL: http://purl.umn.edu/25500 |
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Foltz, Renee D.; Marshall, Maria I.. |
This paper investigates the factors that lead a family business to name a successor for the business, as the succession process often begins with naming a successor. We further separate family businesses into farm and non-farm businesses to compare and contrast the results. The factors used in the probit regression are clustered into three groups: business factors, family factors, and individual factors. Identifying the barriers that family businesses face when naming a successor will help Extension and other small and family business consulting agencies and organizations to formulate a guide to assist families when working through this process. |
Tipo: Presentation |
Palavras-chave: Family business; Small farms; Succession; Agribusiness; Consumer/Household Economics; Farm Management. |
Ano: 2012 |
URL: http://purl.umn.edu/124272 |
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Registros recuperados: 43 | |
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