LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 4 of total 4

Search options

  1. Article ; Online: Sampling bias and the robustness of ecological metrics for plant-damage-type association networks.

    Swain, Anshuman / Azevedo-Schmidt, Lauren E / Maccracken, S Augusta / Currano, Ellen D / Dunne, Jennifer A / Labandeira, Conrad C / Fagan, William F

    Ecology

    2023  Volume 104, Issue 3, Page(s) e3922

    Abstract: Plants and their insect herbivores have been a dominant component of the terrestrial ecological landscape for the past 410 million years and feature intricate evolutionary patterns and co-dependencies. A complex systems perspective allows for both ... ...

    Abstract Plants and their insect herbivores have been a dominant component of the terrestrial ecological landscape for the past 410 million years and feature intricate evolutionary patterns and co-dependencies. A complex systems perspective allows for both detailed resolution of these evolutionary relationships as well as comparison and synthesis across systems. Using proxy data of insect herbivore damage (denoted by the damage type or DT) preserved on fossil leaves, functional bipartite network representations provide insights into how plant-insect associations depend on geological time, paleogeographical space, and environmental variables such as temperature and precipitation. However, the metrics measured from such networks are prone to sampling bias. Such sensitivity is of special concern for plant-DT association networks in paleontological settings where sampling effort is often severely limited. Here, we explore the sensitivity of functional bipartite network metrics to sampling intensity and identify sampling thresholds above which metrics appear robust to sampling effort. Across a broad range of sampling efforts, we find network metrics to be less affected by sampling bias and/or sample size than richness metrics, which are routinely used in studies of fossil plant-DT interactions. These results provide reassurance that cross-comparisons of plant-DT networks offer insights into network structure and function and support their widespread use in paleoecology. Moreover, these findings suggest novel opportunities for using plant-DT networks in neontological terrestrial ecology to understand functional aspects of insect herbivory across geological time, environmental perturbations, and geographic space.
    MeSH term(s) Animals ; Selection Bias ; Benchmarking ; Insecta ; Plants ; Plant Leaves ; Herbivory
    Language English
    Publishing date 2023-01-06
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 2010140-5
    ISSN 1939-9170 ; 0012-9658
    ISSN (online) 1939-9170
    ISSN 0012-9658
    DOI 10.1002/ecy.3922
    Database MEDical Literature Analysis and Retrieval System OnLINE

    Full text online

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  2. Article: Scars on fossil leaves: An exploration of ecological patterns in plant–insect herbivore associations during the Age of Angiosperms

    Currano, Ellen D. / Azevedo-Schmidt, Lauren E. / Maccracken, S. Augusta / Swain, Anshuman

    Palaeogeography, palaeoclimatology, palaeoecology. 2021 Nov. 15, v. 582

    2021  

    Abstract: Ancient plant–insect herbivore associations can be studied directly through observation of feeding damage scars on well-preserved leaf adpression fossils. Early work on insect herbivory was largely qualitative and descriptive. The establishment of the ... ...

    Abstract Ancient plant–insect herbivore associations can be studied directly through observation of feeding damage scars on well-preserved leaf adpression fossils. Early work on insect herbivory was largely qualitative and descriptive. The establishment of the insect damage census protocol by Wilf and Labandeira in 1999 modernized the study of ancient insect herbivory, formalized the functional feeding group–damage type (DT) system, and allowed rigorous quantitative analyses. In this review, we first discuss how to recognize insect herbivore damage and conduct insect damage censuses, as well as the importance of collecting these data.We then present a compilation of all published insect damage census data from angiosperm-dominated ecosystems that included at least 300 fossil dicot leaves. These 66 datasets range from Late Cretaceous to Pleistocene in age and include the majority of continents. Damage richness, damage frequency, relative abundance distributions of functional feeding groups, and ecological network metrics were computed for each site. We investigated spatio-temporal variations and tested potential drivers using various statistical analyses. Reassuringly, herbivory metrics do not appear to be influenced by publication date or depositional setting. There is no linear correlation between herbivory and geologic age, and the few significant differences that occur among time bins document the importance of the K-Pg extinction event on insect herbivory. When sites are partitioned into latitudinal bins, the mid southern hemisphere (60°S to 23°27′S) stands out as having frequent and diverse damage. High latitudes tend to have low damage richness and frequency, although not all differences are significant. Mean annual temperature influences herbivory more than any potential abiotic or biotic driver explored in our analyses and has significant positive relationships with total, specialized, and galling DT richness at 300 leaves, as well as specialized damage frequency. We close our paper by discussing best practices and promising avenues for future insect herbivory research.
    Keywords Late Cretaceous epoch ; Magnoliopsida ; Pleistocene epoch ; census data ; data collection ; extinction ; fossils ; leaves ; palaeogeography ; paleoclimatology ; paleoecology ; phytophagous insects ; temperature
    Language English
    Dates of publication 2021-1115
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 417718-6
    ISSN 0031-0182
    ISSN 0031-0182
    DOI 10.1016/j.palaeo.2021.110636
    Database NAL-Catalogue (AGRICOLA)

    Full text online

    More links

    Kategorien

    In stock of ZB MED Bonn / Germany

    Z 67/162: Show issues

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  3. Article ; Online: Sampling bias and the robustness of ecological metrics for plant–damage‐type association networks

    Swain, Anshuman / Azevedo‐Schmidt, Lauren E. / Maccracken, S. Augusta / Currano, Ellen D. / Dunne, Jennifer A. / Labandeira, Conrad C. / Fagan, William F.

    Ecology. 2023 Mar., v. 104, no. 3 p.e3922-

    2023  

    Abstract: Plants and their insect herbivores have been a dominant component of the terrestrial ecological landscape for the past 410 million years and feature intricate evolutionary patterns and co‐dependencies. A complex systems perspective allows for both ... ...

    Abstract Plants and their insect herbivores have been a dominant component of the terrestrial ecological landscape for the past 410 million years and feature intricate evolutionary patterns and co‐dependencies. A complex systems perspective allows for both detailed resolution of these evolutionary relationships as well as comparison and synthesis across systems. Using proxy data of insect herbivore damage (denoted by the damage type or DT) preserved on fossil leaves, functional bipartite network representations provide insights into how plant–insect associations depend on geological time, paleogeographical space, and environmental variables such as temperature and precipitation. However, the metrics measured from such networks are prone to sampling bias. Such sensitivity is of special concern for plant–DT association networks in paleontological settings where sampling effort is often severely limited. Here, we explore the sensitivity of functional bipartite network metrics to sampling intensity and identify sampling thresholds above which metrics appear robust to sampling effort. Across a broad range of sampling efforts, we find network metrics to be less affected by sampling bias and/or sample size than richness metrics, which are routinely used in studies of fossil plant–DT interactions. These results provide reassurance that cross‐comparisons of plant–DT networks offer insights into network structure and function and support their widespread use in paleoecology. Moreover, these findings suggest novel opportunities for using plant–DT networks in neontological terrestrial ecology to understand functional aspects of insect herbivory across geological time, environmental perturbations, and geographic space.
    Keywords fossils ; landscapes ; paleoecology ; phytophagous insects ; sample size ; temperature
    Language English
    Dates of publication 2023-03
    Publishing place John Wiley & Sons, Inc.
    Document type Article ; Online
    Note JOURNAL ARTICLE
    ZDB-ID 1797-8
    ISSN 0012-9658
    ISSN 0012-9658
    DOI 10.1002/ecy.3922
    Database NAL-Catalogue (AGRICOLA)

    Full text online

    More links

    Kategorien

    In stock of ZB MED Bonn / Germany

    Z 4' 49/37: Show issues
    Z 7543: Show issues

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  4. Article: Plant and insect herbivore community variation across the Paleocene-Eocene boundary in the Hanna Basin, southeastern Wyoming.

    Azevedo Schmidt, Lauren E / Dunn, Regan E / Mercer, Jason / Dechesne, Marieke / Currano, Ellen D

    PeerJ

    2019  Volume 7, Page(s) e7798

    Abstract: Ecosystem function and stability are highly affected by internal and external stressors. Utilizing paleobotanical data gives insight into the evolutionary processes an ecosystem undergoes across long periods of time, allowing for a more complete ... ...

    Abstract Ecosystem function and stability are highly affected by internal and external stressors. Utilizing paleobotanical data gives insight into the evolutionary processes an ecosystem undergoes across long periods of time, allowing for a more complete understanding of how plant and insect herbivore communities are affected by ecosystem imbalance. To study how plant and insect herbivore communities change during times of disturbance, we quantified community turnover across the Paleocene--Eocene boundary in the Hanna Basin, southeastern Wyoming. This particular location is unlike other nearby Laramide basins because it has an abundance of late Paleocene and Eocene coal and carbonaceous shales and paucity of well-developed paleosols, suggesting perpetually high water availability. We sampled approximately 800 semi-intact dicot leaves from five stratigraphic levels, one of which occurs late in the Paleocene-Eocene thermal maximum (PETM). Field collections were supplemented with specimens at the Denver Museum of Nature & Science. Fossil leaves were classified into morphospecies and herbivore damage was documented for each leaf. We tested for changes in plant and insect herbivore damage diversity using rarefaction and community composition using non-metric multidimensional scaling ordinations. We also documented changes in depositional environment at each stratigraphic level to better contextualize the environment of the basin. Plant diversity was highest during the mid-late Paleocene and decreased into the Eocene, whereas damage diversity was highest at the sites with low plant diversity. Plant communities significantly changed during the late PETM and do not return to pre-PETM composition. Insect herbivore communities also changed during the PETM, but, unlike plant communities, rebound to their pre-PETM structure. These results suggest that insect herbivore communities responded more strongly to plant community composition than to the diversity of species present.
    Language English
    Publishing date 2019-10-15
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2703241-3
    ISSN 2167-8359
    ISSN 2167-8359
    DOI 10.7717/peerj.7798
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

To top