GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Online Resource
    Online Resource
    Ubiquitous germination among common perennial species in response to facilitated and unfacilitated microhabitats
    Elsevier BV ; 2016
    In:  Journal of Arid Environments Vol. 124 ( 2016-01), p. 72-79
    Details
    In: Journal of Arid Environments, Elsevier BV, Vol. 124 ( 2016-01), p. 72-79
    Type of Medium: Online Resource
    ISSN: 0140-1963
    URL: Article
    DOI: 10.1016/j.jaridenv.2015.07.012
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2016
    detail.hit.zdb_id: 1468983-2
    SSG: 12
    SSG: 14
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    The intersections of identity and persistence for retention in ecology and environmental biology with personal narratives from Black women
    Informa UK Limited ; 2023
    In:  Journal of Geoscience Education Vol. 71, No. 3 ( 2023-07-03), p. 332-343
    Details
    In: Journal of Geoscience Education, Informa UK Limited, Vol. 71, No. 3 ( 2023-07-03), p. 332-343
    Type of Medium: Online Resource
    ISSN: 1089-9995 , 2158-1428
    URL: Article
    DOI: 10.1080/10899995.2022.2154935
    Language: English
    Publisher: Informa UK Limited
    Publication Date: 2023
    detail.hit.zdb_id: 2375500-3
    SSG: 13
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    Non‐hierarchical competition among co‐occurring woody seedlings in a resource‐limited environment
    Wiley ; 2019
    In:  Ecosphere Vol. 10, No. 5 ( 2019-05)
    Details
    In: Ecosphere, Wiley, Vol. 10, No. 5 ( 2019-05)
    Abstract: Long‐term species persistence in plant communities is contingent in part on the conditions that favor establishment and early survival. In stressful habitats, facilitated seedling establishment can enhance species richness by providing a safe‐site for species unable to establish in open microsites. However, the indirect effects of seedling competition may drive persistence in locations where seedlings occur in high density. This under‐examined dynamic can influence community recovery to stress by favoring competitively dominant species, in particular when stress increases local seedling density in favorable microsites. We present the results of a response surface experiment that examines growth responses among seedlings of Ambrosia dumosa , Eriogonum fasciculatum , and Larrea tridentata that were planted at three densities and four relative frequencies. These species co‐occur at an extensively monitored reference community located in the Colorado Desert, California, USA , where extensive drought caused unprecedented mortality that will require novel recruitment for the community to reach pre‐disturbance composition. Significant, non‐hierarchical competitive responses show that seedling survival is contingent on the species identity and density of neighboring seedlings. This result supports non‐hierarchical competition among these common species. Ambrosia and Eriogonum had faster growth rates than Larrea , but also experienced larger reductions in growth from competition than Larrea . Although drought may intensify seedling competition in favorable locations, the context dependency of competitive outcomes may permit coexistence.
    Type of Medium: Online Resource
    ISSN: 2150-8925 , 2150-8925
    URL: Issue
    URL: Article
    DOI: 10.1002/ecs2.2019.10.issue-5
    DOI: 10.1002/ecs2.2751
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 2572257-8
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    Biting the hand that feeds: the invasive grass Schismus barbatus (Poaceae) is facilitated by, but reduces establishment of, the native shrub Ambrosia dumosa (Asteraceae)
    Wiley ; 2009
    In:  Journal of Vegetation Science Vol. 20, No. 2 ( 2009-04), p. 241-250
    Details
    In: Journal of Vegetation Science, Wiley, Vol. 20, No. 2 ( 2009-04), p. 241-250
    Abstract: Question: We present a study of positive and negative interactions between the invasive grass Schismus barbatus (Poaceae) and Ambrosia dumosa (Asteraceae). Ambrosia facilitates seedling establishment, and such facilitation may accelerate invasion of exotic species, which, in turn, may reduce establishment of native plants. Location: Joshua Tree National Park, California, USA. Methods: During 2003‐2004, we used field surveys to characterize the natural spatial distribution of Schismus in relation to native shrubs, and experimentally manipulated seed rain of Ambrosia and Schismus at three distances from adult Ambrosia canopies. We measured percentage germination and individual performance of both species. Field data were complemented by a greenhouse experiment that measured competition between Ambrosia seedlings and Schismus planted at three densities and five relative abundances under controlled conditions. Results: Field surveys showed that the density of Schismus is independent of Ambrosia shrubs, but growth is enhanced near shrub canopies. In our field experiment Schismus is facilitated by adult Ambrosia . Under controlled conditions, Schismus does not respond to the density of Ambrosia seedlings, but changes in density of Schismus decreased performance of Ambrosia seedlings. Conclusion: Schismus invasion may be detrimental to native perennial plant populations. Although a reduction of seedling establishment is not usually expected to slow population growth of long‐lived perennials, recent unprecedented adult mortality in this community, and the well‐documented facilitative role of Ambrosia , suggest that Schismus invasion may be of high ecological significance.
    Type of Medium: Online Resource
    ISSN: 1100-9233 , 1654-1103
    URL: Issue
    URL: Article
    DOI: 10.1111/jvs.2009.20.issue-2
    DOI: 10.1111/j.1654-1103.2009.05588.x
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2009
    detail.hit.zdb_id: 2047714-4
    detail.hit.zdb_id: 1053769-7
    SSG: 12
    SSG: 23
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 5
    Online Resource
    Online Resource
    When Seed Dispersal Matters
    Oxford University Press (OUP) ; 2004
    In:  BioScience Vol. 54, No. 7 ( 2004), p. 651-
    Details
    In: BioScience, Oxford University Press (OUP), Vol. 54, No. 7 ( 2004), p. 651-
    Type of Medium: Online Resource
    ISSN: 0006-3568
    URL: Article
    DOI: 10.1641/0006-3568(2004)054[0651:WSDM]2.0.CO;2
    RVK:
    WA 15000
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2004
    detail.hit.zdb_id: 2066019-4
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 6
    Online Resource
    Online Resource
    Context-specific enhanced invasiveness of Raphanus crop–wild hybrids: A test for associations between greater fecundity and population growth
    Canadian Science Publishing ; 2014
    In:  Canadian Journal of Plant Science Vol. 94, No. 8 ( 2014-11), p. 1315-1324
    Details
    In: Canadian Journal of Plant Science, Canadian Science Publishing, Vol. 94, No. 8 ( 2014-11), p. 1315-1324
    Abstract: Campbell, L. G., Teitel, Z., Miriti, M. N. and Snow, A. A. 2014. Context-specific enhanced invasiveness of Raphanus crop–wild hybrids: A test for associations between greater fecundity and population growth. Can. J. Plant Sci. 94: 1315–1324. Evolution by crop–wild hybridization may create plant lineages with greater population growth rates, dispersal, and persistence than weedy progenitors, depending upon plant density. We asked: (1) how does hybridization affect demography and population growth rate (lambda, λ) and (2) how does density affect demography and λ? Over 1 yr, we followed wild radish, Raphanus raphanistrum and crop-wild hybrid, Raphanus sativus×R. raphanistrum, plants grown in 18 experimental sub-populations (originally derived from three wild and three hybrid populations) to assess contributions of germination, survival, and seed production to λ. We explored genotypic differences in demographic characteristics of low- and high-density populations (from populations grown at unmanipulated densities for three generations), using a LTRE. Hybrid populations had greater λs than weedy progenitors when grown in low (but not high) densities. Seed production was more influential on λ than germination or survival, and seed mortality was least influential. Our results indicate weedy Raphanus populations may be best controlled by limiting seed production, rather than killing plants outright or preventing seeds from germinating. Furthermore, relative invasiveness of genotypes is density-dependent, low-density conditions improving potential invasiveness of hybrid populations. We emphasize that assessing invasive potential of a plant will be more successful if one uses a comprehensive demographic approach accounting for a weed's entire life history.
    Type of Medium: Online Resource
    ISSN: 0008-4220 , 1918-1833
    URL: Article
    DOI: 10.4141/cjps-2014-070
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2014
    detail.hit.zdb_id: 2016989-9
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 7
    Online Resource
    Online Resource
    Advancing an interdisciplinary framework to study seed dispersal ecology
    Oxford University Press (OUP) ; 2020
    In:  AoB PLANTS Vol. 12, No. 2 ( 2020-04-01)
    Details
    In: AoB PLANTS, Oxford University Press (OUP), Vol. 12, No. 2 ( 2020-04-01)
    Abstract: Although dispersal is generally viewed as a crucial determinant for the fitness of any organism, our understanding of its role in the persistence and spread of plant populations remains incomplete. Generalizing and predicting dispersal processes are challenging due to context dependence of seed dispersal, environmental heterogeneity and interdependent processes occurring over multiple spatial and temporal scales. Current population models often use simple phenomenological descriptions of dispersal processes, limiting their ability to examine the role of population persistence and spread, especially under global change. To move seed dispersal ecology forward, we need to evaluate the impact of any single seed dispersal event within the full spatial and temporal context of a plant’s life history and environmental variability that ultimately influences a population’s ability to persist and spread. In this perspective, we provide guidance on integrating empirical and theoretical approaches that account for the context dependency of seed dispersal to improve our ability to generalize and predict the consequences of dispersal, and its anthropogenic alteration, across systems. We synthesize suitable theoretical frameworks for this work and discuss concepts, approaches and available data from diverse subdisciplines to help operationalize concepts, highlight recent breakthroughs across research areas and discuss ongoing challenges and open questions. We address knowledge gaps in the movement ecology of seeds and the integration of dispersal and demography that could benefit from such a synthesis. With an interdisciplinary perspective, we will be able to better understand how global change will impact seed dispersal processes, and potential cascading effects on plant population persistence, spread and biodiversity.
    Type of Medium: Online Resource
    ISSN: 2041-2851
    URL: Article
    DOI: 10.1093/aobpla/plz048
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2020
    detail.hit.zdb_id: 2555823-7
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 8
    Online Resource
    Online Resource
    Demographic consequences of greater clonal than sexual reproduction in Dicentra canadensis
    Wiley ; 2016
    In:  Ecology and Evolution Vol. 6, No. 12 ( 2016-06), p. 3871-3883
    Details
    In: Ecology and Evolution, Wiley, Vol. 6, No. 12 ( 2016-06), p. 3871-3883
    Abstract: Clonality is a widespread life history trait in flowering plants that may be essential for population persistence, especially in environments where sexual reproduction is unpredictable. Frequent clonal reproduction, however, could hinder sexual reproduction by spatially aggregating ramets that compete with seedlings and reduce inter‐genet pollination. Nevertheless, the role of clonality in relation to variable sexual reproduction in population dynamics is often overlooked. We combined population matrix models and pollination experiments to compare the demographic contributions of clonal and sexual reproduction in three Dicentra canadensis populations, one in a well‐forested landscape and two in isolated forest remnants. We constructed stage‐based transition matrices from 3 years of census data to evaluate annual population growth rates, λ . We used loop analysis to evaluate the relative contribution of different reproductive pathways to λ . Despite strong temporal and spatial variation in seed set, populations generally showed stable growth rates. Although we detected some pollen limitation of seed set, manipulative pollination treatments did not affect population growth rates. Clonal reproduction contributed significantly more than sexual reproduction to population growth in the forest remnants. Only at the well‐forested site did sexual reproduction contribute as much as clonal reproduction to population growth. Flowering plants were more likely to transition to a smaller size class with reduced reproductive potential in the following year than similarly sized nonflowering plants, suggesting energy trade‐offs between sexual and clonal reproduction at the individual level. Seed production had negligible effects on growth and tuber production of individual plants. Our results demonstrate that clonal reproduction is vital for population persistence in a system where sexual reproduction is unpredictable. The bias toward clonality may be driven by low fitness returns for resource investment in sexual reproduction at the individual level. However, chronic failure in sexual reproduction may exacerbate the imbalance between sexual and clonal reproduction and eventually lead to irreversible loss of sex in the population.
    Type of Medium: Online Resource
    ISSN: 2045-7758 , 2045-7758
    URL: Issue
    URL: Article
    DOI: 10.1002/ece3.2016.6.issue-12
    DOI: 10.1002/ece3.2163
    Language: English
    Publisher: Wiley
    Publication Date: 2016
    detail.hit.zdb_id: 2635675-2
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 9
    Online Resource
    Online Resource
    The Elephant in the Room: Race and STEM Diversity
    Oxford University Press (OUP) ; 2020
    In:  BioScience Vol. 70, No. 3 ( 2020-03-01), p. 237-242
    Details
    In: BioScience, Oxford University Press (OUP), Vol. 70, No. 3 ( 2020-03-01), p. 237-242
    Abstract: Despite considerable efforts to enhance participation of underrepresented demographics, participation of scholars of color in STEM remains stagnant. In contrast to other academic disciplines, the experiences of STEM scholars of color are relatively unvoiced, which hinders examination of the factors that reduce participation and retention. Social science and education research reveal the importance of intersectional strategies to address institutional and cultural practices that reduce diverse participation. Institutional change requires the support of the STEM workforce. I summarize important issues that influence recruitment and retention and offer strategies that can improve recruitment and retention of faculty of color. Broad awareness among STEM practitioners of the relationship between race and the biases that reduce recruitment and retention of underrepresented scholars can support STEM diversity initiatives.
    Type of Medium: Online Resource
    ISSN: 0006-3568 , 1525-3244
    URL: Article
    DOI: 10.1093/biosci/biz167
    RVK:
    WA 15000
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2020
    detail.hit.zdb_id: 2066019-4
    SSG: 12
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 10
    Online Resource
    Online Resource
    The history of natural history and race: Decolonizing human dimensions of ecology
    Wiley ; 2023
    In:  Ecological Applications Vol. 33, No. 1 ( 2023-01)
    Details
    In: Ecological Applications, Wiley, Vol. 33, No. 1 ( 2023-01)
    Abstract: Natural history, loosely defined as the observational study of organisms in the habitats where they occur, is recognized at the roots of ecology. Although the centrality of natural history in ecology has shifted over time, natural history is currently in resurgence: many again consider it to be the foundation of ecological and evolutionary inquiry and advocate the value of organism‐centered approaches to address contemporary ecological challenges. Educators identify natural history as the foundational entryway into the practice of ecology, for example in the Ecological Society of America's Four‐Dimensional Ecology Education (4DEE) framework. A strong natural history foundation can help generate testable hypotheses to refine mechanistic understanding of the drivers regulating species distributions and abundances and to inform restoration and conservation efforts. Given the resurgence of natural history as the foundation for ecological knowledge and practice, it is important to recognize that natural history has a long history of racism that has impacted ecological thought and priorities. This history shapes not only who conducts ecological science but also foundational ecological concepts. For example, natural history's emphasis on pristine nature untouched by humans disregards or appropriates stewardship and knowledge of most of the world's population. Because of the legacy of chattel slavery, this exclusion is particularly strong for people of African descent. This exclusion narrows ecological inquiry, limits the capacity to find solutions to ecological problems, and risks interventions that perpetuate the relation between eugenics, ecological knowledge, and natural systems. If ecology is to become an inclusive, responsive, and resilient discipline, this knowledge gap must be addressed. We here present the colonial and racist underpinnings of natural history and offer strategies to expand inclusion in the study of nature. Natural history was steeped in racism, providing a hierarchy of cultures and a taxonomy of races. Complementing growing interest in traditional and Indigenous ecological knowledge, we focus on Black ecological knowledge, for example in the study of “maroon ecologies.” Addressing the racist history of natural history is necessary for removing structural and racist barriers to diverse participation and expanding ecological knowledge bases in service of better and more just science.
    Type of Medium: Online Resource
    ISSN: 1051-0761 , 1939-5582
    URL: Issue
    URL: Article
    DOI: 10.1002/eap.v33.1
    DOI: 10.1002/eap.2748
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 2010123-5
    SSG: 12
    SSG: 23
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...