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| Wasof, Safaa; Lenoir, Jonathan; Hattab, Tarek; Jamoneau, Aurelien; Gallet-moron, Emilie; Ampoorter, Evy; Saguez, Robert; Bennsadek, Lamine; Bertrand, Romain; Valdes, Alicia; Verheyen, Kris; Decocq, Guillaume. |
| Questions How does plant community diversity influence variation in plant biomass? There are two competing hypotheses: the ‘biomass‐ratio hypothesis’, where biomass is influenced by the abundance and traits of the most dominant species, and the ‘diversity hypothesis’, where the diversity of organisms influences biomass through mechanisms such as niche complementarity. However, no studies have tested which one of these two hypotheses better explains the variation in plant biomass in the forest understorey. Location Temperate deciduous forests in Northern France. Methods For the forest understorey, we assessed species diversity and biomass as well as soil and light conditions in 133 forest plots of 100m² each. Using mixed‐effect models and after controlling... |
| Tipo: Text |
Palavras-chave: Biodiversity; Biomass; Biomass ratio hypothesis; Forest understorey; Functional diversity; Ivy; Phylogeny; Production. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00433/54441/55799.pdf |
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| Almoussawi, Ali; Lenoir, Jonathan; Jamoneau, Aurélien; Hattab, Tarek; Wasof, Safaa; Gallet‐moron, Emilie; Garzon‐lopez, Carol X.; Spicher, Fabien; Kobaissi, Ahmad; Decocq, Guillaume; Collins, Beverly. |
| Questions Forest fragmentation affects biodiversity locally (α diversity) and beyond — at relatively larger scales (γ diversity) — by increasing dispersal and recruitment limitations. Yet, does an increase in fragmentation affect the relationship between α and γ diversity and what can we learn from it? Location Northern France. Methods We surveyed 116 forest patches across three fragmentation levels: none (continuous forest); intermediate (forest patches connected by hedgerows); and high (isolated forest patches). Plant species richness of both forest specialists and generalists was surveyed at five nested spatial resolutions across each forest patch: 1 m2; 10 m2; 100 m2; 1,000 m2; and total forest patch area. First, we ran log‐ratio models to quantify the... |
| Tipo: Text |
Palavras-chave: Agricultural landscapes; Alpha diversity; Anthropogenic disturbances; Community assembly; Dispersal limitations; Gamma diversity; Habitat conservation strategies; Habitat fragmentation; Local-regional richness relationship; Metacommunity dynamics. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00592/70438/68577.pdf |
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| Aerts, Raf; Ewald, Michael; Nicolas, Manuel; Piat, Jerome; Skowronek, Sandra; Lenoir, Jonathan; Hattab, Tarek; Garzon-lopez, Carol X.; Feilhauer, Hannes; Schmidtlein, Sebastian; Rocchini, Duccio; Decocq, Guillaume; Somers, Ben; Van De Kerchove, Ruben; Denef, Karolien; Honnay, Olivier. |
| Alien invasive species can affect large areas, often with wide-ranging impacts on ecosystem structure, function, and services. Prunus serotina is a widespread invader of European temperate forests, where it tends to form homogeneous stands and limits recruitment of indigenous trees. We hypotesized that invasion by P. serotina would be reflected in the nutrient contents of the native species' leaves and in the respiration of invaded plots as efficient resource uptake and changes in nutrient cycling by P. serotina probably underly its aggressive invasiveness. We combined data from 48 field plots in the forest of Compiegne, France, and data from an experiment using 96 microcosms derived from those field plots. We used general linear models to separate effects... |
| Tipo: Text |
Palavras-chave: American black cherry; Biological invasion; Biogeochemical cycles; Canopy foliar nutrients; Heterotrophic respiration; Litter; Exotic species; Invasive species. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00398/50981/51739.pdf |
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| Garzon-lopez, Carol X.; Hattab, Tarek; Skowronek, Sandra; Aerts, Raf; Ewald, Michael; Feilhauer, Hannes; Honnay, Olivier; Decocq, Guillaume; Van De Kerchove, Ruben; Somers, Ben; Schmidtlein, Sebastian; Rocchini, Duccio; Lenoir, Jonathan. |
| The synergies between remote sensing technologies and ecological research have opened new avenues for the study of alien plant invasions worldwide. Such scientific advances have greatly improved our capacity to issue warnings, develop early-response systems and assess the impacts of alien plant invasions on biodiversity and ecosystem functioning. Hitherto, practical applications of remote sensing approaches to support nature conservation actions are lagging far behind scientific advances. Yet, for some of these technologies, knowledge transfer is difficult due to the complexity of the different data handling procedures and the huge amounts of data it involves per spatial unit. In this context, the next logical step is to develop clear guidelines for the... |
| Tipo: Text |
Palavras-chave: Biological invasions; Ecosystem impact; Hyperspectral images; LiDAR; Species detection and mapping; Species distribution models. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00435/54645/56071.pdf |
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