Inspired by the importance of globally well-constrained carbon:nitrogen: phosphorus (C:N:P) ratios in planktonic biomass to understanding nutrient cycles and biotic feedbacks marine ecosystems, we looked for analogous patterns forest ecosystems worldwide. We used data from literature examine stoichiometry C, N, P foliage litter on both global biome levels. Additionally, examined scaling investments with production within biomes determine if when these respond macroscale ecosystem properties...

Conventional theories of population and community dynamics are based on a single currency such as number individuals, biomass, carbon or energy. However, organisms constructed multiple elements often require them (in particular carbon, phosphorus nitrogen) in different ratios than provided by their resources; this mismatch may constrain the net transfer energy through trophic levels. Ecological stoichiometry, study balance ecological processes, offers framework for exploring effects...

Liebig's law of the minimum, which states that only one element limits growth organisms at any given time, is widely used in ecology. This principle routinely applied to organisms, populations and communities, but can it really be indistinguishably across these different scales? Here we show, by prediction a resource ratio conceptual model with an experimental test carried out microcosms bacteria that, unlike single species, communities are likely adjust their stoichiometry resources....

Abstract Niche Theory is a central framework in ecology based on the recognition that most interactions between organisms are indirect, mediated by biotic and abiotic dynamical environment these live in. Despite its potential generality, theory still mostly focuses how resource–consumer dynamics mediate competition ecological communities. However, it being increasingly recognized positive also play an important role driving structure functioning of communities, from plants to microbes. In...

Most forests in Europe are patchily distributed within the agricultural landscape. Therefore, forest biogeochemistry cannot be understood without considering connectivity of nutrient cycles between patches and fertilized cropland. In this paper, we quantified role roe deer, most widespread wild ungulate Europe, as a vector nitrogen phosphorus from fields to patches, typical landscape southwestern Europe. We derived model transfer data set on deer density, landscape‐use by individual content...

Abstract Aim To test whether the occupancy of shorebirds has changed in eastern Canadian Arctic, and these changes could indicate that shorebird distributions are shifting response to long‐term climate change. Location Foxe Basin Rasmussen Lowlands, Nunavut, Canada. Methods We used a unique set observations, made 25 years apart, using general linear models if there was relationship between species' their species temperature Index, simple version envelope. Results Changes density varied...

Primary producers and decomposers—the two most important groups for the functioning of ecosystems—have complex, indirect interactions. They are mutualists through nutrient cycling, but also competitors inorganic nutrients due to stoichiometric constraints in decomposers. We examine conditions under which they able coexist, hence ecosystems persist, using a stoichiometrically explicit minimum model an ecosystem. The takes into account coupling carbon biomass detritus, limitation...

Body size of large herbivores is a crucial life history variable influencing individual fitness‐related traits. While the importance this parameter in determining temporal trends population dynamics well established, much less information available on spatial variation body at local infra‐population scale. The relatively recent increase landscape fragmentation over last century has lead to substantial heterogeneity habitat quality across modern agricultural landscape. In paper, we analyse...

We present a model of plant-nutrient interactions that extends classical resource competition theory to environments in which essential nutrients (resources) are recycled between plant and soil pools dissolved lost through plant-available (i.e., inorganic forms) or plant-unavailable complex organic pathways. Losses by pathways can alter ratios supplied within the plant-soil system, thereby influencing coexistence among species. In special cases, our extended does not differ from models, but...

Although the influence of dispersal on coexistence mechanisms in metacommunities has received great emphasis, few studies have addressed how such is affected varying regional heterogeneity. We present a mechanistic model resource competition metacommunity based classical models plant for limiting resources. defined heterogeneity as differences supply rates (or availabilities) across local communities. As suggested by previous work, highest diversify occurred at intermediate levels among...

Abstract Symbiotic nitrogen (N)‐fixing plants are abundant during primary succession, as typical bedrocks lack available N. In turn, fixed N accumulates in soils through biomass turnover and recycling, favouring more nitrophilous organisms. Yet, it is unclear how this facilitation mechanism interacts with competition for other limiting nutrients such phosphorus (P) affects succession. Here, we introduce a resource‐explicit, community assembly model of N‐fixing species analyze successional...

Recent studies on plant–herbivore indirect interactions via nutrient recycling have led to the hypothesis that herbivores with a low nitrogen: phosphorus ratio, feeding plants higher recycle relatively more nitrogen, driving into limitation. We demonstrate in this paper such is valid only under restricted conditions, i.e. ratio of inorganic nutrients supplied system must be neither too high nor compared whole plant + herbivore biomass. If greater affinity for than can even promote nitrogen...

Abstract Plant dispersal is crucial to maintaining plant community dynamics, especially in the current context of rapid environmental changes such as global warming and landscape fragmentation. We seized opportunity carry out a pilot study on endozoochorous by endangered Pyrenean brown bear. based our faeces collected Brown Bear Network location data from three bears fitted with GPS collars translocated Slovenia Pyrenees 2006. studied 39 faecal samples, 25 which contained seeds two different...

1 To improve our understanding of the relationship between pitcher plant (Sarracenia purpurea) and phytotelma community inhabiting its leaves we built an exploratory, mechanistic model based on stochiometric constraints carbon nitrogen associated with prey decomposition. 2 Our theoretical results suggest that is acting as a mineralizing system producing for plant. This confirmed by data collected in field literature, show amount produced decomposition sufficiently high to be considered major...

AME Aquatic Microbial Ecology Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 53:323-332 (2008) - DOI: https://doi.org/10.3354/ame01254 Coexistence of algae and bacteria: a test carbon hypothesis Tanguy Daufresne1,*, Gerard Lacroix2, David Benhaim3, Michel Loreau4 1INRA, Department Wildlife Behavior (CEFS), Chemin de Borde Rouge, BP 52627, 31326 Castanet-Tolosan Cedex, France 2UMR 7618, Bioemco,...

The connectedness in Arctic regions between migratory waterbird populations originating from different continents and the potential for virus exchange at their shared breeding ground point to need explore largely unstudied circumpolar circulation of avian influenza viruses (AIV). We here report investigation AIV wild birds lakes a high area Northeast Greenland. No could be detected fecal, feather, water samples collected large flocks pink-footed geese Anser brachyrhynchus barnacle Branta...