9 Works

Meta-analysis on pulse disturbances reveals differences in functional and compositional recovery across ecosystems

Helmut Hillebrand & Charlotte Kunze
Most ecosystems are affected by anthropogenic or natural pulse disturbances, which alter the community composition and functioning for a limited period of time. Whether and how quickly communities recover from such pulses is central to our understanding of biodiversity dynamics and ecosystem organization, but also to nature conservation and management. Here, we present a meta-analysis of 508 (semi-)natural field experiments globally distributed across marine, terrestrial and freshwater ecosystems. We found recovery to be significant yet...

Including dynamics in the equation: Tree growth rates and host specificity of vascular epiphytes

Katrin Wagner & Gerhard Zotz
1. The forest canopy is home to a rich biota. One salient feature are the dynamics of the habitat-building trees, which are growing and eventually vanishing. Tree species strongly differ in growth rates, final size and longevity. Nevertheless, these inherent dynamics have been a blind spot in studies on host specificity of vascular epiphytes (vascular plants dwelling on trees without parasitizing them) – not least because tree growth rates and longevity are usually unknown in...

Data from: Morphological and molecular diagnostic species characters of Staurozoa (Cnidaria) collected on the coast of Helgoland (German Bight, North Sea)

Sabine Holst, Anneke Heins & Silke Laakmann
Scientific knowledge and records on staurozoans are limited probably because of their inconspicuous life habit and the small number of specialists for this taxon. To increase the awareness for Staurozoa, we identified morphological and molecular features of the three staurozoan species Haliclystus tenuis Kishinouye, 1910, Haliclystus auricula Clark, 1863, and Craterolophus convolvulus (Johnston, 1835) collected on the coast of the island Helgoland to evaluate their suitability as diagnostic characters. Useful macromorphological diagnostic features were the...

Data from: Internally coupled middle ears enhance the range of interaural time differences heard by the chicken

Christine Koeppl
Interaural time differences (ITD) are one of several principle cues for localizing sounds. However, ITD are in the sub-millisecond range for most animals. Because the neural processing of such small ITDs pushes the limit of temporal resolution, the precise ITD-range for a given species and its usefulness - relative to other localization cues - was a powerful selective force in the evolution of the neural circuits involved. Birds and other non-mammals have internally coupled middle...

Data from: Non-native species spread in a complex network: the interaction of global transport and local population dynamics determines invasion success

Hanno Seebens, Elizabeta Briski, Sara Ghabooli, Tamara Shiganova, Hugh MacIsaac & Bernd Blasius
The number of released individuals, which is a component of propagule pressure, is considered to be a major driver for the establishment success of non-native species. However, propagule pressure is often assumed to result from single or few release events, which does not necessarily apply to the frequent releases of invertebrates or other taxa through global transport. For instance, the high intensity of global shipping may result in frequent releases of large numbers of individuals,...

Data from: Idenitfying hybrids & the genomics of hybridization: mallards & American black ducks of Eastern North America

Philip Lavretsky, Thijs Janzen & Kevin G. McCracken
Resolving evolutionary relationships and establishing population structure depends on molecular diagnosability that is often limited for closely related taxa. Here, we use 3,200 ddRAD-seq loci across 290 mallards, American black ducks, and putative hybrids to establish population structure and estimate hybridization rates. We test between traditional assignment probability and accumulated recombination events based analyses to assign hybrids to generational classes. For hybrid identification, we report the distribution of recombination events complements ADMIXTURE simulation by extending...

Data from: Hybridization among the species of Veronica subg. Pseudolysimachium from the Altai detected by SRAP markers

Petr Kosachev, Eike Mayland-Quellhorst & Dirk C. Albach
Veronica subg. Pseudolysimachium is widely known and cultivated because of the large and dense inflorescences of its species. Their success as cultivated plant stems in part to the cross-compatibility across the subgenus and in the part to the wide ecological amplitude from species growing in wetlands to others growing in semi-deserts. Hybridization between species is believed to be frequent due to the large morphological variation and intermediate forms in sympatry of their putative parents. The...

Maintaining genetic integrity with high promiscuity: Frequent hybridization with low introgression in multiple hybrid zones of Melocactus(Cactaceae)

Khan Gulzar, Evandro Marsola De Moraes, Fernando Faria Franco, Gislaine A.R. Silva, Juliana R. Bombonato, Marlon Machado, Diego P. Alonso, Paulo E.M. Ribolla & Dirk C. Albach
Hybridization and introgression between species in contact/hybrid zones provide important insight into the genetic and ecological mechanisms of speciation. Cactaceae represents the most important radiation of true succulent angiosperms in the New World. This diversification continues to date, with species experiencing few intrinsic barriers to gene flow and the frequent occurrence of natural hybridization. Here, we used RAD-Seq single-nucleotide polymorphism (SNP) data to investigate the genetic architecture of hybridization in four hybrid zones hosting Melocactus...

Data from: Historical contingency and productivity effects on food-chain length

Hideyuki Doi & Helmut Hillebrand
Food-chain length (FCL) is a fundamental ecosystem attribute, integrating information on both food web composition and ecosystem processes. It remains untested whether FCL also reflects the history of community assembly known to affect community composition and ecosystem functioning. Here, we performed microcosm experiments with a copepod (top predator), two ciliate species (intermediate consumers), and bacteria (producers), and modified the sequence of species introduction into the microcosm at four productivity levels to jointly test the effects...

Registration Year

  • 2019
    9

Resource Types

  • Dataset
    9

Affiliations

  • Carl von Ossietzky University of Oldenburg
    9
  • Sao Paulo State University
    1
  • Federal University of São Carlos
    1
  • Senckenberg Biodiversity and Climate Research Centre
    1
  • University of Windsor
    1
  • University of Miami
    1
  • GEOMAR Helmholtz Centre for Ocean Research Kiel
    1
  • Senckenberg am Meer
    1
  • The University of Texas at El Paso
    1
  • Altai State University
    1