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  • 1
    In: Austral Ecology, Wiley, Vol. 49, No. 1 ( 2024-01)
    Type of Medium: Online Resource
    ISSN: 1442-9985 , 1442-9993
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2024
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    detail.hit.zdb_id: 2019899-1
    SSG: 12
    SSG: 14
    SSG: 7,29
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  • 2
    Online Resource
    Online Resource
    Wiley ; 2018
    In:  Austral Ecology Vol. 43, No. 5 ( 2018-08), p. 567-577
    In: Austral Ecology, Wiley, Vol. 43, No. 5 ( 2018-08), p. 567-577
    Abstract: Fire is a key ecological factor affecting plant dynamics. In the last few decades, fire occurrence in the Chaco region has increased noticeably, challenging the adaptive capacity of plants to regenerate after a fire. Broad‐leaved forb species have been much less studied than woody and graminoids, although they are an important component of fire dynamics. Here we analysed the germination response to heat shock of 70 and 110°C, smoke and their combination in 10 broad‐leaved herbaceous species frequently occurring in the Chaco Serrano of Córdoba province, central Argentina, including five annual ( Bidens subalternans , Conyza bonariensis , Schkuhria pinnata , Tagetes minuta and Zinnia peruviana ) and five perennial species ( Borreria eryngioides , Sida rhombifolia , Solidago chilensis , Taraxacum officinale and Verbena litoralis ). We also compared the response of annual versus perennial species. Six species had highest germination when treated with heat and smoke combined, whereas two had lowest germination under this treatment, indicating synergistic and antagonistic interaction of these factors respectively. Most of the species tolerated heat shock (i.e. germination was similar to that in control treatment), whereas others had higher germination in response to heat shock, especially under the moderate 70°C treatment. Germination was higher than control (i.e. no heat and no smoke) after smoke treatment in four species. Perennial species showed higher average germination than annuals in both heat treatments and in the control. Annual species had higher average germination for all treatments involving smoke. The high variability observed at the species level, and the limited number of species studied calls for precaution in interpreting and extrapolating results. Nevertheless, our study shows a general positive response of both perennial and annual species to fire cues, suggesting an advantage of these species for colonizing post‐fire environments, and being favoured under scenarios of increasingly frequent low‐to‐medium intensity fires.
    Type of Medium: Online Resource
    ISSN: 1442-9985 , 1442-9993
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2018
    detail.hit.zdb_id: 2095166-8
    detail.hit.zdb_id: 2019899-1
    SSG: 12
    SSG: 14
    SSG: 7,29
    Location Call Number Limitation Availability
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  • 3
    Online Resource
    Online Resource
    Wiley ; 2021
    In:  Austral Ecology Vol. 46, No. 5 ( 2021-08), p. 818-832
    In: Austral Ecology, Wiley, Vol. 46, No. 5 ( 2021-08), p. 818-832
    Abstract: Cacti are conspicuous plants across arid and semi‐arid ecosystems of the American continent and are currently under threat due to human pressures, such as habitat loss, illegal collection and changes in fire regimes. Although much of their habitat is highly fire prone, there are strikingly few studies on their germination response to fire cues. The aim of this work was to analyse the effect of heat shock (simulating wildfires) on the ‘germination %’ and the ‘mean germination time’ of 13 cactus species of two growth forms (six columnar and seven globose) from a fire‐prone cactus diversity hotspot in Córdoba Mountains, central Argentina. We also analysed the effect of growth form and seed mass on species responses. Seeds were subjected to the following treatments: 70°C/5 min, 70°C/10 min, 105°C/5 min, 105°C/10 min and a control (i.e. no heat). Germination decreased under at least one treatment in seven species, increased in three species, had contrasting changes in one species, and showed no effect of treatments in two species. Germination was faster in eight species, slower in one species and showed no effects of treatments in four species. Germination was significantly higher for globose species following the 70°C/10 min treatment and for columnar species under the treatment of 110°C/10 min; while germination time did not differ between growth forms. Seed mass did not have a significant effect on germination, and only affected germination time under the 70ºC treatments, under which lighter seeds germinated faster than heavier seeds. Our results show that the studied species exhibited a high diversity of responses, with most of the species presenting tolerance to heat shock, and that under certain conditions growth form and seed mass are important traits related to species responses to heat shock treatments.
    Type of Medium: Online Resource
    ISSN: 1442-9985 , 1442-9993
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 2095166-8
    detail.hit.zdb_id: 2019899-1
    SSG: 12
    SSG: 14
    SSG: 7,29
    Location Call Number Limitation Availability
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  • 4
    Online Resource
    Online Resource
    Wiley ; 2011
    In:  Austral Ecology Vol. 36, No. 7 ( 2011-11), p. 821-829
    In: Austral Ecology, Wiley, Vol. 36, No. 7 ( 2011-11), p. 821-829
    Type of Medium: Online Resource
    ISSN: 1442-9985
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2011
    detail.hit.zdb_id: 2019899-1
    SSG: 12
    SSG: 14
    SSG: 7,29
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  • 5
    In: People and Nature, Wiley, Vol. 6, No. 2 ( 2024-04), p. 474-489
    Abstract: Read the free Plain Language Summary for this article on the Journal blog.
    Type of Medium: Online Resource
    ISSN: 2575-8314 , 2575-8314
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2024
    detail.hit.zdb_id: 3005781-4
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  • 6
    Online Resource
    Online Resource
    Wiley ; 2023
    In:  Functional Ecology Vol. 37, No. 8 ( 2023-08), p. 2143-2158
    In: Functional Ecology, Wiley, Vol. 37, No. 8 ( 2023-08), p. 2143-2158
    Abstract: Plant fire syndromes are usually defined as combinations of fire response traits, the most common being resprouting (R) and seeding (S). Plant flammability (F), on the other hand, refers to a plant's effects on communities and ecosystems. Despite its important ecological and evolutionary implications, F has rarely been considered to define plant fire syndromes and, if so, usually separated from response syndromes. We propose a three‐dimensional model that combines R, S and F, encapsulating both plant response to fire regimes and the capacity to promote them. Each axis is divided into three possible standardized categories, reflecting low, medium and high values of each variable, with a total of 27 possible combinations of R, S and F. We hypothesized that different fire histories should be reflected in the position of species within the three‐dimensional space, and that this should help assess the importance of fire as an evolutionary force in determining R‐S‐F syndromes. To illustrate our approach, we compiled information on the fire syndromes of 24 dominant species of different growth forms from the Chaco seasonally dry forest of central Argentina, and we compared them to 33 species from different Mediterranean‐type climate ecosystems (MTCEs) of the world. Chaco and MTCEs species differed in the range (7 syndromes vs. 13 syndromes, respectively) and proportion of extreme syndromes (i.e. species with extreme values of R, S and/or F) representing 29% of species in the Chaco vs. 45% in the MTCEs. In addition, we explored the patterns of R, S and F of 4032 species from seven regions with contrasting fire histories, and found significantly higher frequencies of extreme values (predominantly high) of all three variables in MTCEs compared to the other regions, where intermediate and low values predominated, broadly supporting our general hypothesis. The proposed three‐dimensional approach should help standardize comparisons of fire syndromes across taxa, growth forms and regions with different fire histories. This will contribute to the understanding of the role of fire in the evolution of plant traits and assist vegetation modelling in the face of changes in fire regimes. Read the free Plain Language Summary for this article on the Journal blog.
    Type of Medium: Online Resource
    ISSN: 0269-8463 , 1365-2435
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 2020307-X
    detail.hit.zdb_id: 619313-4
    SSG: 12
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  • 7
    In: Journal of Ecology, Wiley, Vol. 105, No. 2 ( 2017-03), p. 298-309
    Abstract: Ecological research produces a tremendous amount of data, but the diversity in scales and topics covered and the ways in which studies are carried out result in large numbers of small, idiosyncratic data sets using heterogeneous terminologies. Such heterogeneity can be attributed, in part, to a lack of standards for acquiring, organizing and describing data. Here, we propose a terminological resource, a T hesaurus O f P lant characteristics ( TOP ), whose aim is to harmonize and formalize concepts for plant characteristics widely used in ecology. TOP concentrates on two types of plant characteristics: traits and environmental associations. It builds on previous initiatives for several aspects: (i) characteristics are designed following the entity‐quality (EQ) model (a characteristic is modelled as the ‘Quality’ 〈 Q 〉 of an ‘Entity’ 〈 E 〉 ) used in the context of Open Biological Ontologies; (ii) whenever possible, the Entities and Qualities are taken from existing terminology standards, mainly the Plant Ontology ( PO ) and Phenotypic Quality Ontology ( PATO ) ontologies; and (iii) whenever a characteristic already has a definition, if appropriate, it is reused and referenced. The development of TOP , which complies with semantic web principles, was carried out through the involvement of experts from both the ecology and the semantics research communities. Regular updates of TOP are planned, based on community feedback and involvement. TOP provides names, definitions, units, synonyms and related terms for about 850 plant characteristics. TOP is available online ( www.top-thesaurus.org ), and can be browsed using an alphabetical list of characteristics, a hierarchical tree of characteristics, a faceted and a free‐text search, and through an Application Programming Interface. Synthesis . Harmonizing definitions of concepts, as proposed by TOP , forms the basis for better integration of data across heterogeneous data sets and terminologies, thereby increasing the potential for data reuse. It also allows enhanced scientific synthesis. TOP therefore has the potential to improve research and communication not only within the field of ecology, but also in related fields with interest in plant functioning and distribution.
    Type of Medium: Online Resource
    ISSN: 0022-0477 , 1365-2745
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2017
    detail.hit.zdb_id: 3023-5
    detail.hit.zdb_id: 2004136-6
    SSG: 12
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