17 Works

Data from: Eversion and withdrawal of an intromittent organ before sexual maturation prepares male beetles for copulation

Yoko Matsumura & Takuya Kubo
Some species of criocerine beetles have a hyper-elongated part of the intromittent organ called a flagellum. In resting position, the flagellum is stored in a specialized internal sac in the intromittent organ. This specialized state of the flagellum and internal sac is indispensable during copulation for flagellar insertion into the female spermathecal duct for sperm transfer. However, the morphogenesis of the flagellum does not generate the active state of the flagellum; rather, the flagellum is...

Data from: Definition and estimation of vital rates from repeated censuses: choices, comparisons and bias corrections focusing on trees

Takashi S. Kohyama, Tetsuo I. Kohyama, Douglas Sheil & Takashi Kohyama
1.Mortality and recruitment rates are fundamental measures of population dynamics. Ecologists and others have defined and estimated these vital rates in various ways. We review these alternatives focusing on tree population census data in fixed area plots, though many aspects have wider application when similar data characteristics and assumptions apply: our goal is to guide choices and facilitate comparisons. 2.We divide our estimates into ‘instantaneous’ and ‘annual’ rates, corresponding to continuous- or discrete-time dynamics respectively....

Data from: Winter warming effects on tundra shrub performance are species-specific and dependent on spring conditions

Eveline J. Krab, Jonas Rönnefarth, Marina Becher, Gesche Blume-Werry, Frida Keuper, Jonatan Klaminder, Juergen Kreyling, Kobayashi Makoto, Ann Milbau, Ellen Dorrepaal & Jonas Roennefarth
1. Climate change driven increases in winter temperatures positively affect conditions for shrub growth in arctic tundra by decreasing plant frost damage and stimulation of nutrient availability. However, the extent to which shrubs may benefit from these conditions may be strongly dependent on the following spring climate. Species-specific differences in phenology and spring frost sensitivity likely affect shrub growth responses to warming. Additionally, effects of changes in winter and spring climate may differ over small...

Data from: Form–function relationships in a marine foundation species depend on scale: a shoot to global perspective from a distributed ecological experiment

Jennifer L. Ruesink, John J. Stachowicz, Pamela L. Reynolds, Christoffer Boström, Mathieu Cusson, James Douglass, Johan Eklöf, Aschwin H. Engelen, Masakazu Hori, Kevin Hovel, Katrin Iken, Per-Olav Moksnes, Masahiro Nakaoka, Mary I. O'Connor, Jeanine L. Olsen, Erik E. Sotka, Matthew A. Whalen & Emmett J. Duffy
Form-function relationships in plants underlie their ecosystem roles in supporting higher trophic levels through primary production, detrital pathways, and habitat provision. For widespread, phenotypically-variable plants, productivity may differ not only across abiotic conditions, but also from distinct morphological or demographic traits. A single foundation species, eelgrass (Zostera marina), typically dominates north temperate seagrass meadows, which we studied across 14 sites spanning 32-61° N latitude and two ocean basins. Body size varied by nearly two orders...

Data from: Individual differences are consistent across changes in mating status and mediated by biogenic amines

Nicholas DiRienzo & Hitoshi Aonuma
Although aspects of an individual’s state are well-known to influence the expression of behavior, it is still unclear how elements of state affect consistent among-individual differences in behavior. With binary, irreversible elements of state, such as mating status, there may be optimal behavioral phenotypes before and after mating, with individuals often prioritizing mate acquisition before and resource acquisition after. Yet, limited plasticity may prevent optimal behavior in both contexts. Additionally, it remains largely unknown if...

Data from: Combining niche-shift and population genetic analyses predicts rapid phenotypic evolution during invasion

Erik E. Sotka, Aaron W. Baumgardner, Paige M. Bippus, Claude Destombe, Elizabeth A. Duermit, Hikaru Endo, Ben A. Flanagan, Mits Kamiya, Lauren E. Lees, Courtney J. Murren, Masahiro Nakaoka, Sarah J. Shainker, Allan E. Strand, Ryuta Terada, Myriam Valero, Florian Weinberger, Stacy A. Krueger-Hadfield & Christophe Destombe
Rapid evolution of non-native species can facilitate invasion success, but recent reviews indicate that such microevolution rarely yields expansion of the climatic niche in the introduced habitats. However, because some invasions originate from a geographically restricted portion of the native species range and its climatic niche, it is possible that the frequency, direction and magnitude of phenotypic evolution during invasion has been underestimated. We explored the utility of niche-shift analyses in the red seaweed Gracilaria...

Data from: New records of the late Pliensbachian to early Toarcian (Early Jurassic) gladius-bearing coleoid cephalopods from the Ya Ha Tinda Lagerstätte, Canada

Selva M. Marroquín, Rowan C. Martindale & Dirk Fuchs
The Ya Ha Tinda Lagerstätte from Alberta, Canada, is the first Jurassic marine Konservat-Lagerstätte from North America and hosts a substantial collection of exceptionally preserved fossil Vampyropoda specimens. Vampyropods are soft-bodied cephalopods (coleoids) characterized by eight arms and an internalized chitinous shell (gladius). Due to their lack of hard parts, Vampyropoda have a fragmentary fossil record, largely limited to exceptional Lagerstätten deposits. Excavations at Ya Ha Tinda have uncovered sixteen vampyropod fossils from Pliensbachian and...

Data from: Mating success follows duet dancing in the Java sparrow

Masayo Soma & Midori Iwama
Mutual interactions between sexes have multiple signalling functions. Duet singing in songbirds is related to mutual mate guarding, joint resource defence, and signalling commitment. Coordinated visual displays of mating pairs are thought to perform similar functions, but are less well understood. The current study evaluated mutual interactions in an Estrildid species to explore the relative importance of duet dancing and male singing in mating success of pairs in a first encounter. When Java sparrows (Lonchura...

Data from: Effects of radiation from contaminated soil and moss in Fukushima on embryogenesis and egg hatching of the aphid Prociphilus oriens

Shin-Ichi Akimoto, Yang Li, Tetsuji Imanaka, Hitoshi Sato & Ken Ishida
Radiation-contaminated soils are widespread around the Fukushima Daiichi Nuclear Power Plant, and such soils raise concerns over its harmful effect on soil-dwelling organisms. We evaluated the effects of contaminated soil and moss sampled in Fukushima on the embryogenesis and hatching of aphid eggs, along with the measurement of the egg exposure dose. Cs-137 concentration in soil and moss from Fukushima ranged from 2200 to 3300 Bq/g and from 64 to 105 Bq/g, respectively. Eggs of...

Data from: Parasite infection induces size-dependent host dispersal: consequences for parasite persistence

Akira Terui, Keita Ooue, Hirokazu Urabe & Futoshi Nakamura
Host dispersal is now recognized as a key predictor of the landscape-level persistence and expansion of parasites. However, current theories treat post-infection dispersal propensities as a fixed trait, and the plastic nature of host’s responses to parasite infection has long been underappreciated. Here, we present a mark-recapture experiment in a single-host parasite system (larval parasites of the freshwater mussel Margaritifera laevis and its salmonid fish host Oncorhynchus masou masou) and provide the first empirical evidence...

Data from: Broad-scale trophic shift in the pelagic North Pacific revealed by an oceanic seabird

Peggy H. Ostrom, Anne E. Wiley, Helen F. James, Sam Rossman, William A. Walker, Elise F. Zipkin & Yoshito Chikaraishi
Human-induced ecological change in the open oceans appears to be accelerating. Fisheries, climate change and elevated nutrient inputs are variously blamed, at least in part, for altering oceanic ecosystems. Yet it is challenging to assess the extent of anthropogenic change in the open oceans, where historical records of ecological conditions are sparse, and the geographical scale is immense. We developed millennial-scale amino acid nitrogen isotope records preserved in ancient animal remains to understand changes in...

Data from: Frequency-dependent selection acting on the widely fluctuating sex ratio of the aphid Prociphilus oriens

Yang Li & Shin-Ichi Akimoto
Frequency-dependent selection is a fundamental principle of adaptive sex-ratio evolution in all sex ratio theories but has rarely been detected in the wild. Through long-term censuses, we confirmed large fluctuations in the population sex ratio of the aphid Prociphilus oriens and detected frequency-dependent selection acting on these fluctuations. Fluctuations in the population sex ratio were partly attributable to climatic factors during the growing season. Climatic factors likely affected the growth conditions of host plants, which...

Data from: Adoption of alternative migratory tactics: a view from the ultimate mechanism and threshold trait changes in a salmonid fish

Genki Sahashi & Kentaro Morita
Partial migration, in which a portion of the population migrates while the rest of the population remains as residents, is a common form of migration. Alternative migratory tactics (AMTs) of partial migration are often determined by polygenic threshold traits. However, the ultimate mechanisms that drive inter-population variations in threshold traits are not well understood. We present a simple schematic model to explain how the threshold trait changes with fitness consequences under opposing natural and artificial...

Data from: Genetic divergence with ongoing gene flow is maintained by the use of different hosts in phytophagous ladybird beetles genus Henosepilachna

Kei W. Matsubayashi, Tetsuo I. Kohyama, Norio Kobayashi, Satoko Yamasaki, Masakazu Kuwajima & Haruo Katakura
Adaptation to different environments can promote population divergence via natural selection even in the presence of gene flow–a phenomenon that typically occurs during ecological speciation. To elucidate how natural selection promotes and maintains population divergence during speciation, we investigated the population genetic structure, degree of gene flow and heterogeneous genomic divergence in three closely related Japanese phytophagous ladybird beetles: Henosepilachna pustulosa, H. niponica and H. yasutomii. These species act as a generalist, a wild thistle...

Data from: Marine protected area restricts demographic connectivity: dissimilarity in a marine environment can function as a biological barrier

Masaaki Sato, Kentaro Honda, Wilfredo H. Uy, Darwin I. Baslot, Tom G. Genovia, Yohei Nakamura, Lawrence Patrick C. Bernardo, Hiroyuki Kurokochi, Allyn Duvin S. Pantallano, Chunlan Lian, Kazuo Nadaoka & Masahiro Nakaoka
The establishment of marine protected areas (MPAs) can often lead to environmental differences between MPAs and fishing zones. To determine the effects on marine dispersal of environmental dissimilarity between an MPA and fishing zone, we examined the abundance and recruitment patterns of two anemonefishes (Amphiprion frenatus and A. perideraion) that inhabit sea anemones in different management zones (i.e., an MPA and two fishing zones) by performing a field survey and a genetic parentage analysis. We...

Data from: Heterogeneous genetic makeup of the Japanese house mouse (Mus musculus) created by multiple independent introductions and spatio-temporally diverse hybridization processes

Takashi Kuwayama, Mitsuo Nunome, Gohta Kinoshita, Kuniya Abe & Hitoshi Suzuki
In this study, phylogenetic analysis of relatively long sequences of mitochondrial DNA (4225 bp) in the Japanese house mouse Mus musculus provides the first evidence that both southern Asian subspecies of Mus musculus castaneus (CAS) and northern Asian subspecies of Mus musculus musculus (MUS) arrived in Japan through rapid population expansion events, from Southern China ~4000 years ago and the Korean Peninsula ~2000 years ago, respectively. Nuclear DNA haplotype structure analyses targeting a chromosome region...

Data from: Detection of an endangered aquatic heteropteran using environmental DNA in a wetland ecosystem

Hideyuki Doi, Izumi Katano, Yusuke Sakata, Rio Souma, Toshihiro Kosuge, Mariko Nagano, Kousuke Ikeda, Koki Yano & Koji Tojo
The use of environmental DNA (eDNA) has recently been employed to evaluate the distribution of various aquatic macroorganisms. Although this technique has been applied to a broad range of taxa, from vertebrates to invertebrates, its application is limited for aquatic insects such as aquatic heteropterans. Nepa hoffmanni (Heteroptera: Nepidae) is a small (approx. 23 mm) aquatic heteropteran that inhabits wetlands, can be difficult to capture and is endangered in Japan. The molecular tool eDNA was...

Registration Year

  • 2017
    17

Resource Types

  • Dataset
    17

Affiliations

  • Hokkaido University
    17
  • University of Tokyo
    3
  • College of Charleston
    2
  • University of Alabama at Birmingham
    1
  • University of Washington
    1
  • The University of Texas at Austin
    1
  • Research Institute for Nature and Forest
    1
  • Kyushu University
    1
  • University of California System
    1
  • Tokyo Institute of Technology
    1