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  • 1
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    (Table TS1) Vegetation cover according to plant functional types before experimental removal in plots, central Argentina (2009)
    PANGAEA
    Details
    Publication Date: 2023-09-30
    Keywords: Argentina; DATE/TIME; Family; Hand corer; HCOR; SierraGrande_Cordoba; Species; Vegetation, cover; Vegetation type
    Type: Dataset
    Format: text/tab-separated-values, 84 data points
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  • 2
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    (Table TS4) Spore density, diversity and evenness of different arbuscular mycorrhizal fungi morphotaxa 39 months after experimental removal of plant functional types, central Argentina (2009)
    PANGAEA
    Details
    Publication Date: 2023-09-30
    Keywords: Acaulospora laevis; Acaulospora laevis, standard deviation; Acaulospora mellea; Acaulospora mellea, standard deviation; Acaulospora scrobiculata; Acaulospora scrobiculata, standard deviation; Argentina; DATE/TIME; Diversity; Diversity, standard error; Entrophospora infrequens; Entrophospora infrequens, standard deviation; Evenness of species; Glomus aggregatum; Glomus aggregatum, standard deviation; Glomus claroideum; Glomus constrictum; Glomus constrictum, standard deviation; Glomus intraradices; Glomus intraradices, standard deviation; Glomus sp.; Glomus sp., standard deviation; Hand corer; HCOR; Scutellospora biornata; Scutellospora biornata, standard deviation; Scutellospora sp.; Scutellospora sp., standard deviation; SierraGrande_Cordoba; Spores; Spores, standard deviation; Standard deviation; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 177 data points
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  • 3
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    (Table TS3) Spore density, diversity and evenness of different arbuscular mycorrhizal fungi morphotaxa 36 months after experimental removal of plant functional types, central Argentina (2009)
    PANGAEA
    Details
    Publication Date: 2023-09-30
    Keywords: Acaulospora laevis; Acaulospora laevis, standard deviation; Acaulospora mellea; Acaulospora scrobiculata; Acaulospora scrobiculata, standard deviation; Argentina; DATE/TIME; Diversity; Diversity, standard error; Entrophospora infrequens; Entrophospora infrequens, standard deviation; Evenness of species; Glomus aggregatum; Glomus aggregatum, standard deviation; Glomus claroideum; Glomus claroideum, standard deviation; Glomus constrictum; Glomus constrictum, standard deviation; Glomus intraradices; Glomus intraradices, standard deviation; Glomus sp.; Glomus sp., standard deviation; Hand corer; HCOR; Scutellospora biornata; Scutellospora biornata, standard deviation; Scutellospora sp.; Scutellospora sp., standard deviation; SierraGrande_Cordoba; Spores; Spores, standard deviation; Standard deviation; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 180 data points
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  • 4
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    (Table 2) Spore density, diversity and evenness of different arbuscular mycorrhizal fungi morphotaxa 29 months after experimental removal of plant functional types, central Argentina (2009)
    PANGAEA
    Details
    Publication Date: 2023-09-30
    Keywords: Acaulospora laevis; Acaulospora laevis, standard deviation; Acaulospora mellea; Acaulospora scrobiculata; Acaulospora scrobiculata, standard deviation; Argentina; DATE/TIME; Diversity; Diversity, standard error; Entrophospora infrequens; Entrophospora infrequens, standard deviation; Evenness of species; Glomus aggregatum; Glomus aggregatum, standard deviation; Glomus claroideum; Glomus claroideum, standard deviation; Glomus constrictum; Glomus constrictum, standard deviation; Glomus intraradices; Glomus intraradices, standard deviation; Glomus sp.; Glomus sp., standard deviation; Hand corer; HCOR; Scutellospora biornata; Scutellospora biornata, standard deviation; Scutellospora sp.; Scutellospora sp., standard deviation; SierraGrande_Cordoba; Spores; Spores, standard deviation; Standard deviation; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 163 data points
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  • 5
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    Initial vegetation, and spore density, diversity and evenness of different arbuscular mycorrhizal fungi morphotaxa 29,36 and 39 months after experimental vegetation removal, central Argentina (2009)
    PANGAEA
    In:  Supplement to: Urcelay, Carlos; Díaz, Sandra; Gurvich, Diego E; Chapin, F Stuart; Cuevas, Elvira; Domínguez, Laura S (2009): Mycorrhizal community resilience in response to experimental plant functional type removals in a woody ecosystem. Journal of Ecology, 97(6), 1291-1301, https://doi.org/10.1111/j.1365-2745.2009.01582.x
    Details
    Publication Date: 2023-12-13
    Description: 1. Dominant plant functional types (PFTs) are expected to be primary determinants of communities of other above- and below-ground organisms. Here, we report the effects of the experimental removal of different PFTs on arbuscular mycorrhizal fungi (AMF) communities in a shrubland ecosystem in central Argentina. 2. On the basis of the biomass-ratio hypothesis and plant resource use strategy theory, we expected the effect of removal of PFTs on AMF colonization and spores to be proportional to the biomass removed and to be stronger when more conservative PFTs were removed. The treatments applied were: undisturbed control (no plant removed), disturbed control (mechanical disturbance), no shrub (removal of deciduous shrubs), no perennial forb (removal of perennial forbs), no graminoid (removal of graminoids) and no annual forb (removal of annual forbs). AMF colonization was assessed after 5,17 and 29 months. Total density of AMF spores, richness and evenness of morpho-taxa, and AMF functional groups were quantified after 5,17,29,36 and 39 months. 3. Five months after the initial removal we found a significant reduction in total AMF colonization in all plots subjected to PFT removals and in the disturbed control plots, as compared with the undisturbed controls. This effect disappeared afterwards and no subsequent effect on total colonization and colonization by arbuscules was observed. In contrast, a significant increase in colonization by vesicles was observed in months 17 and 29, mainly in no graminoid plots. In general, treatments did not significantly affect AMF spores in the soil. On the other hand, no annual forb promoted transient (12-18 months) higher ammonia availability, and no shrub promoted lower nitrate availability in the longer term (24-28 months). 4. Synthesis. Our experiment, the first to investigate the effects of the removal of different PFTs on AMF communities in natural ecosystems, indicates that AMF communities are resilient to changes in the soil and in the functional composition of vegetation. Furthermore, it does not provide consistent evidence in support of the biomass-ratio hypothesis or differential trait-based direct or indirect effects of different PFTs on AMF in this particular system.
    Keywords: Argentina; Hand corer; HCOR; International Polar Year (2007-2008); IPY; SierraGrande_Cordoba
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 6
    Electronic Resource
    Electronic Resource
    Leaf traits and herbivore selection in the field and in cafeteria experiments (2003)
    Oxford, UK : Blackwell Science Pty
    Austral ecology 28 (2003), S. 0 
    Details
    ISSN: 1442-9993
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract  Despite the vast diversity and complexity of herbivores, plants and their interactions, most authors agree that a small number of components of leaf quality affect preference by generalist herbivores in a predictable way. However, herbivore preference is determined not only by intrinsic plant attributes and herbivore biology but also by the environmental context. Within this framework, we aimed to analyse general interspecific trends in the association between herbivory and leaf traits over a wide range of angiosperms from central Argentina. We (i) tested for consistent associations between leaf traits, consumption in the field, and preference of generalist invertebrate herbivores in cafeteria experiments; (ii) assessed how well herbivore preferences in cafeterias matched leaf consumption in the field; and (iii) developed a simple conceptual model linking leaf traits, herbivore preference in cafeterias and consumption in the field. In general, we found that tender leaves with higher nutritional quality were preferred by herbivores, both in the field and in cafeteria experiments. According to our model, this relationship between field and cafeteria consumption and leaf quality is observed when generalist herbivores and plants of high accessibility are considered. However, differences between leaf consumption in the field and in cafeteria experiments can also be found. At least two reasons can account for this: (i) specialized plant–herbivore relationships often occur in the field, whereas cafeteria experiments tend to consider only one or a few generalist herbivores; (ii) different plant species growing in the field often differ in their degree of accessibility to herbivores, whereas in cafeteria experiments all species are equally accessible. Our results add new evidence to a growing consensus that, although herbivory in the field is determined by many factors, consistent patterns of differential susceptibility to foliar feeders can be found in leaves differing in nutritional quality and thus in resource-use strategy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1442-9993.2003.01321.x
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  • 7
    Electronic Resource
    Electronic Resource
    Foliar resistance to simulated extreme temperature events in contrasting plant functional and chorological types (2002)
    Oxford, UK : Blackwell Science Ltd
    Global change biology 8 (2002), S. 0 
    Details
    ISSN: 1365-2486
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Geography
    Notes: We analysed leaf resistance of 41 Angiosperms belonging to a wide range of plant functional (PFTs) and chorological types (PCTs) to simulated frost and high-temperature extreme events (EE). Leaf resistance was estimated as percentage of membrane electrolyte leakage under heating and freezing treatments in the lab.Leaf resistance to heating or freezing was not significantly correlated with the main resource-use characteristics that defined PFTs, such as leaf specific area, toughness, N concentration or thickness. Leaf resistance to heating differed among PFTs (graminoids and bromeliads were the more resistant groups), but not among PCTs. In contrast, leaf resistance to freezing significantly differed among PCTs. Along a steep regional climatic gradient, climate variables (annual mean temperature, mean minimum temperature, mean maximum temperature and number of frost-free months) at the locations where the given species were most abundant were also significantly correlated with freezing resistance. Species from colder habitats both at the sub-continental and regional scales showed the highest leaf resistance to freezing. Our work indicates that leaf resistance to climatic EE and resource-use strategy (assessed in previous studies) represent two different, partially decoupled axes of plant specialisation. It also suggests that changes in the frequency of very low temperature events might have regional-scale impacts on vegetation, whereas changes in the frequency of very high temperature events might have more influence at the local scale.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2486.2002.00540.x
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  • 8
    Electronic Resource
    Electronic Resource
    Edaphic patchiness influences grassland regeneration from the soil seed-bank in mountain grasslands of central Argentina (2001)
    Melbourne, Australia : Blackwell Science Asia Pty. Ltd.
    Austral ecology 26 (2001), S. 0 
    Details
    ISSN: 1442-9993
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The soil seed-banks in the main natural vegetation patches that make up mountain grasslands on granite substrates in central Argentina were studied. The main natural vegetation types are moist swards, tall-tussock grasslands and stony grasslands. Ten compound soil samples from each community at two soil depths (0–5 and 5–10 cm) were taken. The density of soil seed-banks was highest in moist swards, intermediate in stony grasslands and lowest in tall-tussock grasslands. Low levels of similarity were found between the established vegetation and total soil seed-bank in tall-tussock grasslands and stony grasslands, but the similarity was higher in swards. In all three communities the seed-bank was most frequently transient in nature. Short-term persistent and long-term persistent seed-banks were less frequent. Regeneration from the seed-banks after disturbance is expected to differ among communities on different edaphic patches. On the basis of the density and longevity of the soil seed-banks and the similarity to the established vegetation, potential for in situ regeneration should be lower in tall-tussock grasslands, intermediate in stony grasslands and higher in moist swards.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1442-9993.2001.01102.x
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  • 9
    Electronic Resource
    Electronic Resource
    Below-ground biomass and productivity of a grazed site and a neighbouring ungrazed exclosure in a grassland in central Argentina (2004)
    Oxford, UK : Blackwell Science Pty
    Austral ecology 29 (2004), S. 0 
    Details
    ISSN: 1442-9993
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract  We estimated the below-ground net plant productivity (BNPP) of different biomass components in an intensively and continuously 45-ha grazed site and in a neighbouring exclosure ungrazed for 16 years for a natural mountain grassland in central Argentina. We measured approximately twice as much dead below-ground biomass in the grazed site as in the ungrazed site, with a strong concentration of total below-ground biomass towards the upper 10 cm of the soil layer in both sites. The main contribution to total live biomass was accounted for by very fine (〈0.5 mm) and fine roots (0.5–1.0 mm) both at the grazed (79%) and at the ungrazed (81%) sites. We measured more dead biomass for almost all root components, more live biomass of rhizomes, tap roots and bulbs, and less live biomass of thicker roots (〉1 mm) in the grazed site. The seasonal variation of total live below-ground biomass mainly reflected climate, with the growing season being limited to the warmer and wetter portion of the year, but such variation was higher in the grazed site. Using different methods of estimation of BNPP, we estimated maximum values of 1241 and 723 g m−2 year−1 for the grazed and ungrazed sites, respectively. We estimated that very fine root productivity was almost twice as high at the grazed site as at the ungrazed one, despite the fact that both sites had similar total live biomass, and root turnover rate was twofold at the grazed site.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1442-9993.2004.01337.x
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  • 10
    Electronic Resource
    Electronic Resource
    Consequences of changing biodiversity (2000)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 405 (2000), S. 234-242 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Human alteration of the global environment has triggered the sixth major extinction event in the history of life and caused widespread changes in the global distribution of organisms. These changes in biodiversity alter ecosystem processes and change the resilience of ecosystems to environmental ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35012241
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