12 Works

Data from: Do intraspecific or interspecific interactions determine responses to predators feeding on a shared size-structured prey community?

Hanna Ten Brink, Abul Kalam Azad Mazumdar, Joseph Huddart, Lennart Persson & Tom C. Cameron
1. Coexistence of predators that share the same prey is common. This is still the case in size structured predator communities where predators consume prey species of different sizes (interspecific prey responses) or consume different size classes of the same species of prey (intraspecific prey responses). 2. A mechanism has recently been proposed to explain coexistence between predators that differ in size but share the same prey species, emergent facilitation, which is dependent on strong...

Data from: Resource competition across habitat boundaries asymmetric interactions between benthic and pelagic producers

Christoph Gerald Jäger & Sebastian Diehl
In shallow aquatic systems benthic and pelagic primary producers typically compete for light and nutrients along opposing vertical supply axes pelagic algae shade the benthic habitat; conversely, benthic algae intercept the nutrient flux from the sediment to the pelagic habitat. We present a general framework for analyzing such spatially asymmetric resource competition across habitat boundaries using a mechanistic, dynamical model. We visualize the mechanisms determining the outcome of these cross-habitat interactions using zero-net-growth-isoclines, resource supply...

Data from: Extremely low nucleotide polymorphism in Pinus krempfii Lecomte, a unique flat needle pine endemic to Vietnam

Baosheng Wang, Marjan Khalili Mahani, Wei Lun Ng, Junko Kusumi, Hai Hong Phi, Nobuyuki Inomata, Xiao-Ru Wang & Alfred E. Szmidt
Pinus krempfii Lecomte is a morphologically and ecologically unique pine, endemic to Vietnam. It is regarded as vulnerable species with distribution limited to just two provinces: Khanh Hoa and Lam Dong. Although a few phylogenetic studies have included this species, almost nothing is known about its genetic features. In particular, there are no studies addressing the levels and patterns of genetic variation in natural populations of P. krempfii. In this study, we sampled 57 individuals...

Data from: Optimization of the genotyping-by-sequencing strategy for population genomic analysis in conifers

Jin Pan, Baosheng Wang, Zhi-Yong Pei, Wei Zhao, Jie Gao, Jian-Feng Mao & Xiao-Ru Wang
Flexibility and low cost make genotyping-by-sequencing (GBS) an ideal tool for population genomic studies of nonmodel species. However, to utilize the potential of the method fully, many parameters affecting library quality and single nucleotide polymorphism (SNP) discovery require optimization, especially for conifer genomes with a high repetitive DNA content. In this study, we explored strategies for effective GBS analysis in pine species. We constructed GBS libraries using HpaII, PstI and EcoRI-MseI digestions with different multiplexing...

Data from: Genome-wide admixture and ecological niche modeling reveal the maintenance of species boundaries despite long history of interspecific gene flow

Amanda R. De La Torre, David R. Roberts & Sally N. Aitken
1.The maintenance of species boundaries despite interspecific gene flow has been a continuous source of interest in evolutionary biology. Many hybridizing species have porous genomes with regions impermeable to introgression, conferring reproductive barriers between species. 2.We used ecological niche modeling to study the glacial and postglacial recolonization patterns between the widely hybridizing spruce species Picea glauca and P. engelmannii in western North America. 3.Genome-wide estimates of admixture based on a panel of 311 candidate gene...

Data from: Hydrology, shore morphology and species traits affect seed dispersal, germination and community assembly in shoreline plant communities

Casper H. A. Van Leeuwen, Judith M. Sarneel, José Van Paassen, Winnie J. Rip & Elisabeth S. Bakker
1.Seed dispersal and germination are two primary processes influencing plant community assembly. On freshwater shores, water levels regulate both processes. However, it is still unclear how water levels, shore morphology and species traits interactively affect seed dispersal and germination, and how these interactions determine plant community assembly. We hypothesize that a drawdown water regime enhances seed establishment compared to a year-round stable water level, that this increases species richness and diversity, and that this is...

Data from: Windows of opportunity for germination of riparian species after restoring water level fluctuations: a field experiment with controlled seed banks

Judith M. Sarneel, Roel H. Janssen, Winnie J. Rip, Irene M. A. Bender & Elisabeth S. Bakker
1. Restoration activities aiming at increasing vegetation diversity often try to stimulate both dispersal and germination. In wetlands, dispersal and germination are coupled as water and water level fluctuations (WLF) simultaneously influence seed transport and germination conditions (soil moisture). Water regime shifts have been shown to affect vegetation composition. However, the interactions between WLF, dispersal and subsequent germination as drivers of such changes are still poorly understood, especially within the complexity of a field situation....

Data from: Fitness dynamics within a poplar hybrid zone: II. Impact of exotic sex on native poplars in an urban jungle.

Amanda D. Roe, Chris J. K. MacQuarrie, Marie-Claude Gros-Louis, J. Dale Simpson, Josyanne Lamarche, Tannis Beardmore, Stacey L. Thompson, Philippe Tanguay, Nathalie Isabel & Chris J.K. MacQuarrie
Trees bearing novel or exotic gene components are poised to contribute to the bioeconomy for a variety of purposes such as bioenergy production, phytoremediation, and carbon sequestration within the forestry sector, but sustainable release of trees with novel traits in large-scale plantations requires the quantification of risks posed to native tree populations. Over the last century, exotic hybrid poplars produced through artificial crosses were planted throughout eastern Canada as ornamentals or windbreaks and these exotics...

Data from: Herbivores enforce sharp boundaries between terrestrial and aquatic ecosystems

Judith M. Sarneel, Naomi Huig, Geertje F. Veen, Winnie Rip & Elisabeth S. Bakker
The transitions between ecosystems (ecotones) are often biodiversity hotspots, but we know little about the forces that shape them. Today, often sharp boundaries with low diversity are found between terrestrial and aquatic ecosystems. This has been attributed to environmental factors that hamper succession. However, ecosystem properties are often controlled by both bottom-up and top-down forces, but their relative importance in shaping riparian boundaries is not known. We hypothesize that (1) herbivores may enforce sharp transitions...

Data from: Fitness dynamics within a poplar hybrid zone: I. Prezygotic and postzygotic barriers impacting a native poplar hybrid stand.

Amanda D. Roe, Chris J. K. MacQuarrie, Marie-Claude Gros-Louis, J. Dale Simpson, Josyanne Lamarche, Tannis Beardmore, Stacey L. Thompson, Philippe Tanguay & Nathalie Isabel
Hybridization and introgression are pervasive evolutionary phenomena that provide insight to the selective forces that maintain species boundaries, permit gene flow and control the direction of evolutionary change. Poplar trees (Populus L.) are well known for their ability to form viable hybrids and maintain their distinct species boundaries despite this interspecific gene flow. We sought to quantify the hybridization dynamics and postzygotic fitness within a hybrid stand of balsam poplar (Populus balsamifera L.), eastern cottonwood...

Data from: Vegetation patterns in small boreal streams relate to ice and winter floods

Lovisa Lind & Christer Nilsson
1. In-stream and riparian vegetation is species-rich, productive and dynamic. Its patterns in small boreal streams are largely driven by seasonal flow regimes. Traditionally, flow-related processes during the growing season, particularly the spring flood, have been seen as the most important, whereas vegetation has been viewed as being dormant and ‘less affected’ during winter. 2. Riparian and in-stream vegetation was inventoried during the summers 2011‒2013 in eight reaches of northern Swedish streams. Along each reach...

Antiviral, antibiotics and decongestants in wastewater treatment plants and receiving rivers in the Thames catchment

A.C. Singer, J.D. Järhult, R. Grabic, G.A. Khan, R.H. Lindberg, G. Fedorova, J. Fick, M.J. Bowes, B. Olsen & H. Söderström
This dataset contains the concentration of eleven antibiotics (trimethoprim, oxytetracycline, ciprofloxacin, azithromycin, cefotaxime, doxycycline, sulfamethoxazole, erythromycin, clarithromycin, ofloxacin, norfloxacin), three decongestants (naphazoline, oxymetazoline, xylometazoline) and the antiviral drug oseltamivir's active metabolite, oseltamivir carboxylate, measured at 21 locations within the River Thames catchment in England. The measurements were taken weekly during November 2009, once in March 2010 and once in May 2011, with the aim to quantify pharmaceutical usage during the influenza pandemic of 2009 and...

Registration Year

  • 2014
    12

Resource Types

  • Dataset
    12

Affiliations

  • Umeå University
    12
  • Nederlands Instituut voor Ecologie
    3
  • Canadian Forest Service
    2
  • Helmholtz Centre for Environmental Research
    1
  • Kyushu University
    1
  • Centre for Ecology & Hydrology
    1
  • UK Centre for Ecology & Hydrology
    1
  • Fukuoka Women's University
    1
  • University of Alberta
    1
  • University of Oslo
    1