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  • 1
    Online Resource
    Online Resource
    TRY plant trait database – enhanced coverage and open access
    Wiley ; 2020
    In:  Global Change Biology Vol. 26, No. 1 ( 2020-01), p. 119-188
    Details
    In: Global Change Biology, Wiley, Vol. 26, No. 1 ( 2020-01), p. 119-188
    Abstract: Plant traits—the morphological, anatomical, physiological, biochemical and phenological characteristics of plants—determine how plants respond to environmental factors, affect other trophic levels, and influence ecosystem properties and their benefits and detriments to people. Plant trait data thus represent the basis for a vast area of research spanning from evolutionary biology, community and functional ecology, to biodiversity conservation, ecosystem and landscape management, restoration, biogeography and earth system modelling. Since its foundation in 2007, the TRY database of plant traits has grown continuously. It now provides unprecedented data coverage under an open access data policy and is the main plant trait database used by the research community worldwide. Increasingly, the TRY database also supports new frontiers of trait‐based plant research, including the identification of data gaps and the subsequent mobilization or measurement of new data. To support this development, in this article we evaluate the extent of the trait data compiled in TRY and analyse emerging patterns of data coverage and representativeness. Best species coverage is achieved for categorical traits—almost complete coverage for ‘plant growth form’. However, most traits relevant for ecology and vegetation modelling are characterized by continuous intraspecific variation and trait–environmental relationships. These traits have to be measured on individual plants in their respective environment. Despite unprecedented data coverage, we observe a humbling lack of completeness and representativeness of these continuous traits in many aspects. We, therefore, conclude that reducing data gaps and biases in the TRY database remains a key challenge and requires a coordinated approach to data mobilization and trait measurements. This can only be achieved in collaboration with other initiatives.
    Type of Medium: Online Resource
    ISSN: 1354-1013 , 1365-2486
    URL: Issue
    URL: Article
    DOI: 10.1111/gcb.v26.1
    DOI: 10.1111/gcb.14904
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2020313-5
    SSG: 12
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  • 2
    Online Resource
    Online Resource
    Climate seasonality limits leaf carbon assimilation and wood productivity in tropical forests
    Copernicus GmbH ; 2016
    In:  Biogeosciences Vol. 13, No. 8 ( 2016-04-28), p. 2537-2562
    Details
    In: Biogeosciences, Copernicus GmbH, Vol. 13, No. 8 ( 2016-04-28), p. 2537-2562
    Abstract: Abstract. The seasonal climate drivers of the carbon cycle in tropical forests remain poorly known, although these forests account for more carbon assimilation and storage than any other terrestrial ecosystem. Based on a unique combination of seasonal pan-tropical data sets from 89 experimental sites (68 include aboveground wood productivity measurements and 35 litter productivity measurements), their associated canopy photosynthetic capacity (enhanced vegetation index, EVI) and climate, we ask how carbon assimilation and aboveground allocation are related to climate seasonality in tropical forests and how they interact in the seasonal carbon cycle. We found that canopy photosynthetic capacity seasonality responds positively to precipitation when rainfall is  〈 2000 mm yr−1 (water-limited forests) and to radiation otherwise (light-limited forests). On the other hand, independent of climate limitations, wood productivity and litterfall are driven by seasonal variation in precipitation and evapotranspiration, respectively. Consequently, light-limited forests present an asynchronism between canopy photosynthetic capacity and wood productivity. First-order control by precipitation likely indicates a decrease in tropical forest productivity in a drier climate in water-limited forest, and in current light-limited forest with future rainfall  〈 2000 mm yr−1.
    Type of Medium: Online Resource
    ISSN: 1726-4189
    URL: Article
    URL: Article
    DOI: 10.5194/bg-13-2537-2016
    DOI: 10.5194/bg-13-2537-2016-supplement
    Language: English
    Publisher: Copernicus GmbH
    Publication Date: 2016
    detail.hit.zdb_id: 2158181-2
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  • 3
    Online Resource
    Online Resource
    Increasing Wood δ15N in Response to Pig Manure Application
    MDPI AG ; 2022
    In:  Forests Vol. 14, No. 1 ( 2022-12-21), p. 8-
    Details
    In: Forests, MDPI AG, Vol. 14, No. 1 ( 2022-12-21), p. 8-
    Abstract: Intensive livestock management impacts forest and trees in different ways. Pig manure is a major source of nitrogen (N) pollution of surface and ground waters in some European regions such as north-eastern Spain, but it is understudied how manure application impacts agroforestry systems. How pig manure affects tree radial growth and the N cycle was assessed by measuring N concentrations in soil, leaves and wood and δ15N in tree-ring wood in two tree species widely planted for agricultural (Prunus dulcis) and reforestation (Pinus halepensis) purposes in the study area. Soil physicochemical characteristics and the biomass and structure of major soil microbial groups were also measured. Trees irrigated with pig effluent (manure application) and control trees not subjected to manure application were compared. Soil N, phosphorus (P) and potassium (K) concentrations of fertilized trees increased, but soil microbiota biomass decreased. Similar growth between fertilized and non-fertilized pine trees was found, but lower growth in fertilized almond trees was observed. Leaf N concentrations decreased but δ15N wood increased in trees subjected to pig manure application. Pig manure application alters the N cycling in the soil and within trees.
    Type of Medium: Online Resource
    ISSN: 1999-4907
    URL: Article
    DOI: 10.3390/f14010008
    Language: English
    Publisher: MDPI AG
    Publication Date: 2022
    detail.hit.zdb_id: 2527081-3
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  • 4
    Online Resource
    Online Resource
    Performance of Drought Indices for Ecological, Agricultural, and Hydrological Applications
    American Meteorological Society ; 2012
    In:  Earth Interactions Vol. 16, No. 10 ( 2012-09-01), p. 1-27
    Details
    In: Earth Interactions, American Meteorological Society, Vol. 16, No. 10 ( 2012-09-01), p. 1-27
    Abstract: In this study, the authors provide a global assessment of the performance of different drought indices for monitoring drought impacts on several hydrological, agricultural, and ecological response variables. For this purpose, they compare the performance of several drought indices [the standardized precipitation index (SPI); four versions of the Palmer drought severity index (PDSI); and the standardized precipitation evapotranspiration index (SPEI)] to predict changes in streamflow, soil moisture, forest growth, and crop yield. The authors found a superior capability of the SPEI and the SPI drought indices, which are calculated on different time scales than the Palmer indices to capture the drought impacts on the aforementioned hydrological, agricultural, and ecological variables. They detected small differences in the comparative performance of the SPI and the SPEI indices, but the SPEI was the drought index that best captured the responses of the assessed variables to drought in summer, the season in which more drought-related impacts are recorded and in which drought monitoring is critical. Hence, the SPEI shows improved capability to identify drought impacts as compared with the SPI. In conclusion, it seems reasonable to recommend the use of the SPEI if the responses of the variables of interest to drought are not known a priori.
    Type of Medium: Online Resource
    ISSN: 1087-3562
    URL: Article
    DOI: 10.1175/2012EI000434.1
    Language: English
    Publisher: American Meteorological Society
    Publication Date: 2012
    detail.hit.zdb_id: 2025258-4
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  • 5
    Online Resource
    Online Resource
    Response of vegetation to drought time-scales across global land biomes
    Proceedings of the National Academy of Sciences ; 2013
    In:  Proceedings of the National Academy of Sciences Vol. 110, No. 1 ( 2013-01-02), p. 52-57
    Details
    In: Proceedings of the National Academy of Sciences, Proceedings of the National Academy of Sciences, Vol. 110, No. 1 ( 2013-01-02), p. 52-57
    Abstract: We evaluated the response of the Earth land biomes to drought by correlating a drought index with three global indicators of vegetation activity and growth: vegetation indices from satellite imagery, tree-ring growth series, and Aboveground Net Primary Production (ANPP) records. Arid and humid biomes are both affected by drought, and we suggest that the persistence of the water deficit (i.e., the drought time-scale) could be playing a key role in determining the sensitivity of land biomes to drought. We found that arid biomes respond to drought at short time-scales; that is, there is a rapid vegetation reaction as soon as water deficits below normal conditions occur. This may be due to the fact that plant species of arid regions have mechanisms allowing them to rapidly adapt to changing water availability. Humid biomes also respond to drought at short time-scales, but in this case the physiological mechanisms likely differ from those operating in arid biomes, as plants usually have a poor adaptability to water shortage. On the contrary, semiarid and subhumid biomes respond to drought at long time-scales, probably because plants are able to withstand water deficits, but they lack the rapid response of arid biomes to drought. These results are consistent among three vegetation parameters analyzed and across different land biomes, showing that the response of vegetation to drought depends on characteristic drought time-scales for each biome. Understanding the dominant time-scales at which drought most influences vegetation might help assessing the resistance and resilience of vegetation and improving our knowledge of vegetation vulnerability to climate change.
    Type of Medium: Online Resource
    ISSN: 0027-8424 , 1091-6490
    URL: Article
    DOI: 10.1073/pnas.1207068110
    RVK:
    TA 1000
    RVK:
    WA 15000
    Language: English
    Publisher: Proceedings of the National Academy of Sciences
    Publication Date: 2013
    detail.hit.zdb_id: 209104-5
    detail.hit.zdb_id: 1461794-8
    SSG: 11
    SSG: 12
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  • 6
    Online Resource
    Online Resource
    Similar diurnal, seasonal and annual rhythms in radial root expansion across two coexisting Mediterranean oak species
    Oxford University Press (OUP) ; 2020
    In:  Tree Physiology Vol. 40, No. 7 ( 2020-06-30), p. 956-968
    Details
    In: Tree Physiology, Oxford University Press (OUP), Vol. 40, No. 7 ( 2020-06-30), p. 956-968
    Abstract: Dendrometers are being increasingly used to measure stem radius changes in trees and to unravel the mechanisms underlying stem daily rhythms of radial expansion and contraction. Nevertheless, automated dendrometers have not been often used to measure root radius dynamics, their relationship with environmental variables and the influence of endogenous processes, especially in drought-prone Mediterranean areas. Here, we measured root radius dynamics of two coexisting oak species (the evergreen Quercus ilex L. and the deciduous Quercus faginea Lam). Our goals were to describe annual, seasonal and diurnal scale root radius patterns and to disentangle the role of different environmental parameters as drivers. Long-term high-resolution measurements (every 15 min over 7 years) were collected with automated point dendrometers on the main tree roots of five individuals per species. Root radius annual change patterns were bimodal and similar for both oak species. Quercus faginea Lam showed three times larger root increment in the spring than Q. ilex, but the bimodal pattern was stronger in Q. ilex, which showed a larger root increment in autumn. Quercus faginea Lam showed an earlier root phenological activation in the spring and in late summer compared with Q. ilex. The effects of environmental drivers across species were similar at daily scales: root radius increased with air temperature and soil moisture, and it decreased with rising vapor pressure deficit. Furthermore, daily root radius variations for both oak species were maintained after extracting statistically the environmental effects, which points toward a significant role of endogenous drivers. These differences in root radius change patterns at seasonal to daily scales likely result from the differences in leaf phenology and growth strategy. Quercus faginea Lam is deciduous and has a faster growing rate in spring than the evergreen Q. ilex, which can grow more in summer.
    Type of Medium: Online Resource
    ISSN: 1758-4469
    URL: Article
    DOI: 10.1093/treephys/tpaa041
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2020
    detail.hit.zdb_id: 1473475-8
    SSG: 12
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  • 7
    Online Resource
    Online Resource
    Functional diversity differently shapes growth resilience to drought for co‐existing pine species
    Wiley ; 2018
    In:  Journal of Vegetation Science Vol. 29, No. 2 ( 2018-03), p. 265-275
    Details
    In: Journal of Vegetation Science, Wiley, Vol. 29, No. 2 ( 2018-03), p. 265-275
    Abstract: What are the differences in tree growth and resilience in response to extreme droughts between three co‐existing pine tree species? Are growth–resilience components more influenced by intrinsic (age, tree height) or extrinsic factors (mass effects or functional diversity of the neighbourhood)? Is the tree's vulnerability to drought buffered by the functional diversity of the surrounding plant community? Location Mediterranean forest, northeast Spain. Methods Trees from three co‐existing pine species with different drought tolerances (Aleppo pine – Pinus halepensis Mill.; Black pine – Pinus nigra subsp. salzmannii (Dunal) Franco; Scots pine – Pinus sylvestris L.) were sampled. The average age of the studed pines was ~30 years. Radial growth from 1980 to 2015 was measured and the pines’ responses to the most severe recent droughts (2005 and 2012) were studied by relating different growth resilience components ( Rt , resistance; Rc , recovery; RRs , relative resilience) with intrinsic (age and height) and extrinsic factors of the neighbouring community around each tree. The considered extrinsic factors were CWM and niche complementarity of tree (height), leaf (specific leaf area, leaf dry matter content) and wood (wood specific gravity) traits. The way in which these factors affected growth resilience to drought was assessed. Results For the whole study period we found lower growth of Scots pine than Aleppo pine, but similar resilience components (except for higher Rt in 2005 for the former species). Despite each drought year resulting in distinct responses, the growth resilience to drought was mostly dependent on tree age for Aleppo pine, while functional diversity modulated a high percentage of the resilience variance of Scots pine. Black pine had an intermediate strategy. CWM explained, in general, less variance of the resilience components than functional diversity. Conclusions The positive effect of surrounding functional diversity on Scots pine could be related to a greater resistance to drought, likely due to improved resource acquisition favouring its performance at the dry limit of its distribution area. Intrinsic tree features, mass effects and functional diversity differently shape growth resilience to different droughts for co‐existing tree species.
    Type of Medium: Online Resource
    ISSN: 1100-9233 , 1654-1103
    URL: Issue
    URL: Article
    DOI: 10.1111/jvs.2018.29.issue-2
    DOI: 10.1111/jvs.12617
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2018
    detail.hit.zdb_id: 2047714-4
    detail.hit.zdb_id: 1053769-7
    SSG: 12
    SSG: 23
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  • 8
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    Online Resource
    Fractal dimension does not adequately describe the complexity of leaf margin in seedlings of Quercus species
    Editorial CSIC ; 2002
    In:  Anales del Jardín Botánico de Madrid Vol. 60, No. 1 ( 2002-06-30)
    Details
    In: Anales del Jardín Botánico de Madrid, Editorial CSIC, Vol. 60, No. 1 ( 2002-06-30)
    Type of Medium: Online Resource
    ISSN: 1988-3196 , 0211-1322
    Uniform Title: Fractal dimension does not adequately describe the complexity of leaf margin in seedlings of Quercus species
    URL: Issue
    URL: Article
    DOI: 10.3989/ajbm.2002.v60.i1
    DOI: 10.3989/ajbm.2002.v60.i1.82
    RVK:
    WA 15000
    Language: English , English
    Publisher: Editorial CSIC
    Publication Date: 2002
    detail.hit.zdb_id: 2203243-5
    SSG: 12
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  • 9
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    Online Resource
    Geographically structured and temporally unstable growth responses of Juniperus thurifera to recent climate variability in the Iberian Peninsula
    Springer Science and Business Media LLC ; 2012
    In:  European Journal of Forest Research Vol. 131, No. 4 ( 2012-7), p. 905-917
    Details
    In: European Journal of Forest Research, Springer Science and Business Media LLC, Vol. 131, No. 4 ( 2012-7), p. 905-917
    Type of Medium: Online Resource
    ISSN: 1612-4669 , 1612-4677
    URL: Article
    DOI: 10.1007/s10342-011-0564-7
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2012
    detail.hit.zdb_id: 2134019-5
    SSG: 23
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  • 10
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    Online Resource
    Early growing-season precipitation drives radial growth of alpine juniper shrubs in the central Himalayas
    Informa UK Limited ; 2020
    In:  Geografiska Annaler: Series A, Physical Geography Vol. 102, No. 3 ( 2020-07-02), p. 317-330
    Details
    In: Geografiska Annaler: Series A, Physical Geography, Informa UK Limited, Vol. 102, No. 3 ( 2020-07-02), p. 317-330
    Type of Medium: Online Resource
    ISSN: 0435-3676 , 1468-0459
    URL: Article
    DOI: 10.1080/04353676.2020.1761097
    RVK:
    RS 59121
    Language: English
    Publisher: Informa UK Limited
    Publication Date: 2020
    detail.hit.zdb_id: 3694-8
    detail.hit.zdb_id: 1480727-0
    SSG: 14
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