Search Results - (Author, Cooperation:D. Tilman)
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1Latest Papers from Table of Contents or Articles in PressY. Hautier ; D. Tilman ; F. Isbell ; E. W. Seabloom ; E. T. Borer ; P. B. Reich
American Association for the Advancement of Science (AAAS)
Published 2015Staff ViewPublication Date: 2015-04-18Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: *Biodiversity ; Carbon Dioxide ; Fires ; Herbivory ; *Human Activities ; Humans ; Nitrogen ; *Plants ; WaterPublished by: -
2Latest Papers from Table of Contents or Articles in PressF. Isbell ; D. Craven ; J. Connolly ; M. Loreau ; B. Schmid ; C. Beierkuhnlein ; T. M. Bezemer ; C. Bonin ; H. Bruelheide ; E. de Luca ; A. Ebeling ; J. N. Griffin ; Q. Guo ; Y. Hautier ; A. Hector ; A. Jentsch ; J. Kreyling ; V. Lanta ; P. Manning ; S. T. Meyer ; A. S. Mori ; S. Naeem ; P. A. Niklaus ; H. W. Polley ; P. B. Reich ; C. Roscher ; E. W. Seabloom ; M. D. Smith ; M. P. Thakur ; D. Tilman ; B. F. Tracy ; W. H. van der Putten ; J. van Ruijven ; A. Weigelt ; W. W. Weisser ; B. Wilsey ; N. Eisenhauer
Nature Publishing Group (NPG)
Published 2015Staff ViewPublication Date: 2015-10-16Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: *Biodiversity ; *Climate ; Climate Change/statistics & numerical data ; Conservation of Natural Resources ; Disasters/statistics & numerical data ; Droughts ; *Ecosystem ; Grassland ; Human Activities ; *Plant Physiological PhenomenaPublished by: -
3Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2014-10-16Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: *Adaptation, Biological ; *Biodiversity ; *Plant Physiological PhenomenaPublished by: -
4Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2015-12-04Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Air Pollution/*adverse effects ; *Biodiversity ; *Environmental Restoration and Remediation ; *Grassland ; Nitrogen/*adverse effects ; Poaceae/*classification/*drug effectsPublished by: -
5Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2014-11-11Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Agriculture/trends ; Diet/*standards/*trends ; *Environment ; Food Industry ; Health/*trends ; Humans ; IncomePublished by: -
6Latest Papers from Table of Contents or Articles in PressJ. A. Foley ; N. Ramankutty ; K. A. Brauman ; E. S. Cassidy ; J. S. Gerber ; M. Johnston ; N. D. Mueller ; C. O'Connell ; D. K. Ray ; P. C. West ; C. Balzer ; E. M. Bennett ; S. R. Carpenter ; J. Hill ; C. Monfreda ; S. Polasky ; J. Rockstrom ; J. Sheehan ; S. Siebert ; D. Tilman ; D. P. Zaks
Nature Publishing Group (NPG)
Published 2011Staff ViewPublication Date: 2011-10-14Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: *Agriculture ; *Conservation of Natural Resources ; Diet ; Environment ; *Food Supply ; Humans ; Models, TheoreticalPublished by: -
7Latest Papers from Table of Contents or Articles in PressF. Isbell ; V. Calcagno ; A. Hector ; J. Connolly ; W. S. Harpole ; P. B. Reich ; M. Scherer-Lorenzen ; B. Schmid ; D. Tilman ; J. van Ruijven ; A. Weigelt ; B. J. Wilsey ; E. S. Zavaleta ; M. Loreau
Nature Publishing Group (NPG)
Published 2011Staff ViewPublication Date: 2011-08-13Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: *Biodiversity ; Ecology/methods ; *Ecosystem ; Extinction, Biological ; Models, Biological ; Plant Development ; *Plant Physiological Phenomena ; *Plants/classification ; Poaceae ; Species SpecificityPublished by: -
8Latest Papers from Table of Contents or Articles in PressB. J. Cardinale ; J. E. Duffy ; A. Gonzalez ; D. U. Hooper ; C. Perrings ; P. Venail ; A. Narwani ; G. M. Mace ; D. Tilman ; D. A. Wardle ; A. P. Kinzig ; G. C. Daily ; M. Loreau ; J. B. Grace ; A. Larigauderie ; D. S. Srivastava ; S. Naeem
Nature Publishing Group (NPG)
Published 2012Staff ViewPublication Date: 2012-06-09Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Animals ; *Biodiversity ; Climate Change/statistics & numerical data ; Consensus ; Ecology/methods/trends ; *Extinction, Biological ; *Human Activities ; HumansPublished by: -
9Latest Papers from Table of Contents or Articles in PressA. P. Kinzig ; C. Perrings ; F. S. Chapin, 3rd ; S. Polasky ; V. K. Smith ; D. Tilman ; B. L. Turner, 2nd
American Association for the Advancement of Science (AAAS)
Published 2011Staff ViewPublication Date: 2011-11-05Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Ecology/*economics ; *Ecosystem ; MarketingPublished by: -
10Latest Papers from Table of Contents or Articles in PressP. B. Reich ; D. Tilman ; F. Isbell ; K. Mueller ; S. E. Hobbie ; D. F. Flynn ; N. Eisenhauer
American Association for the Advancement of Science (AAAS)
Published 2012Staff ViewPublication Date: 2012-05-05Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: *Biodiversity ; Biomass ; *Ecosystem ; Fabaceae/growth & development ; Minnesota ; Nitrogen ; Nitrogen Cycle ; Plant Development ; *Plants ; *Poaceae/growth & development ; Soil/chemistry ; Time FactorsPublished by: -
11Articles: DFG German National LicensesStaff View
ISSN: 0040-5809Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: BiologyType of Medium: Electronic ResourceURL: -
12Articles: DFG German National LicensesStaff View
ISSN: 1432-1939Keywords: Fertilization ; Disturbance ; Interactions ; Nitrogen mineralization ; Old-fieldsSource: Springer Online Journal Archives 1860-2000Topics: BiologyNotes: Summary The interactive effects of fertilization and disturbance on plant community structure and resource availability were studied by supplying four levels of nitrogen and applying four intensities of tilling to a 30 year old field in a factorial design for 2 year. Live above-ground biomass, root biomass, and litter generally increased with nitrogen supply and decreased with disturbance. Species composition varied significantly, with annuals increasing with both nitrogen and disturbance, but with perennials unaffected by nitrogen and decreased by disturbance. Species diversity decreased with disturbance, but decreased with nitrogen only in undisturbed vegetation. Root: shoot ratios decreased with added nitrogen, leaf allocation decreased with disturbance, and flowering allocation increased. Surprisingly, stem allocation was unaffected by disturbance. This result reflected a shift from vertical stems to horizontal stems as disturbance increased. Resource measurements suggested that the vegetation responded to interactions between the treatments as well as to direct treatment effects. Variation in light penetration was reduced by fertilization in undisturbed vegetation but not in tilled plots; variability was not directly affected by disturbance. The availability of nitrogen, the limiting soil nutrient, increased with fertilization but was not significantly affected by disturbance. In contrast, the ratio of ammonium to nitrate was significantly reduced by disturbance but unaffected by supply rates, suggesting that nitrogen may have had different effects under different disturbance regimes, even though its total availability was constant. While many community responses to fertilization and disturbance conformed to those reported earlier, resource and allocation measurements indicated that their interactions are not always predictable from their separate effects.Type of Medium: Electronic ResourceURL: -
13Articles: DFG German National LicensesStaff View
ISSN: 1432-1939Keywords: Cedar Creek ; Minnesota ; Nitrogen mineralization ; Old fields ; SuccessionSource: Springer Online Journal Archives 1860-2000Topics: BiologyNotes: Summary Nitrogen availability and its response to fertilizer amendments was measured by in situ incubation in four old fields ranging in age from 16 to 〉100 years at Cedar Creek Natural History Area. Net nitrogen mineralization in control plots increased with field age, from 4.4 g/m2 in the youngest field to 6.5 g/m2 in the oldest field. The proportion of total N mineralized decreased with field age, from 6.2% of total N mineralized in the youngest field to 4.8% mineralized in the oldest field, suggesting a decrease in organic matter quality with time. Unlike many forests in the region, nitrogen mineralization was correlated with total soil nitrogen content. Greater than 90% of the mineralized N was nitrified in most months. Analyses of variance indicate significant effects of field age and month of year on N mineralization and nitrification, but not effect of fertilizer treatment except in the oldest field. Fertilizer additions did not significantly increase standing pools of mineral N in the youngest or oldest fields but did in the 26 and 50 year old fields. However, changes in mineral N pools did not account for the amount added in fertilizer. Strong plant and microbial sinks for fertilizer and possibly leaching losses may be the reasons why fertilizer additions did not stimulate N mineralizations during the first two years in most fields.Type of Medium: Electronic ResourceURL: -
14Articles: DFG German National LicensesStaff View
ISSN: 1432-1939Keywords: Schizachyrium scoparium ; Decomposition ; Nitrogen ; FertilizationSource: Springer Online Journal Archives 1860-2000Topics: BiologyNotes: Summary We studied the decay and nitrogen dynamics of little bluestem (Schizachyrium scoparium) litter in fertilized and unfertilized Minnesota old fields, using the litterbag technique. Annual decay rates and nitrogen leaching losses during the first month of decay were highly correlated with N content of litter and not with fertilizer additions. After the first month of decay, nitrogen was immobilized for at least 18 months. In contrast to decay rates and early N leaching losses, these immobilization rates were correlated with the amount of ammonium nitrate added in fertilizer rather than with initial %N. Therefore, litter quality and exogenous nitrogen supply appear to have different and independent effects on decay rates and N dynamics of little bluestem litter.Type of Medium: Electronic ResourceURL: -
15Articles: DFG German National LicensesStaff View
ISSN: 1432-1939Keywords: Geomys ; Soil nitrogen ; Gopher mounds ; SuccessionSource: Springer Online Journal Archives 1860-2000Topics: BiologyNotes: Summary Pocket gophers (Geomys bursarius: Geomyidae Rodentia) are shown to affect soil resources and thus, indirectly, vegetation. Gophers reduce average soil nitrogen near the surface and increase point-to-point heterogeneity of soil nitrogen by moving nitrogen-poor subsurface soil to the soil surface. Data from 22 old fields at Cedar Creek Natural History Area, Minnesota, USA show correlations of soil nitrogen, vegetation, and gopher mounds that are consistent with this indirect mechanism by which gophers affect local species composition and old field succession.Type of Medium: Electronic ResourceURL: -
16Articles: DFG German National LicensesStaff View
ISSN: 1432-1939Keywords: Drought ; Extinctions ; Species richness ; Diversity ; ColonizationSource: Springer Online Journal Archives 1860-2000Topics: BiologyNotes: Summary The local species richness of four different grassland fields fell an average of 37% during a 1988 drought that decreased above-ground living plant mass by an average of 47%. Despite the return to more normal plant mass and precipitation during the next two years, there was no significant recovery in species richness in the 46 permanent plots, suggesting that local species richness became recruitment limited. The drought led to the loss of annual species independent of their abundance. For perennial grasses, perennial forbs, legumes and woody species, the probability of a species being lost from a plot was significantly negatively correlated with its predrought abundance. These results demonstrate that environmentally extreme conditions can limit species richness by causing the local extinction of rare species. Because droughts of this intensity occur about every 50 years in the prairie, periodic drought may have limited prairie diversity. Moreover, if the accumulation of greenhouse gases leads to a more variable or extreme climate, it could cause increased rates of species extinctions.Type of Medium: Electronic ResourceURL: