11 Works

Biweekly soil-moisture in the 18 CARBONO Project plots, La Selva Biological Station, March 1998-October 2018

Deborah Clark & Steven Oberbauer
This publication presents the complete 20-year record of volumetric soil moisture in the 18 plots of the CARBONO Project in the old-growth tropical rainforest at La Selva Biological Station, Costa Rica. The measurements were made biweekly through the period March 1998 – October 2018. Volumetric soil moisture was assessed over the top 30 cm of soil. The publication consists of the full data record and documentation of the cross-sensor regressions.

Evaluating kin and group selection as tools for quantitative analysis of microbial data

Jeff Smith & Fredrik Inglis
Kin selection and multilevel selection theory are often used to interpret experiments about the evolution of cooperation and social behaviour among microbes. But while these experiments provide rich, detailed fitness data, theory is mostly used as a conceptual heuristic. Here, evaluate how kin and multilevel selection theory perform as quantitative analysis tools. We reanalyse published microbial datasets and show that the canonical fitness models of both theories are almost always poor fits because they use...

Antibiotic phase transition curves

R. Fredrik Inglis
Phase transitions are an important and extensively studied concept in physics. The insights derived from understanding phase transitions in physics have also recently and successfully been applied to a number of different phenomena in biological systems. Here, we provide a brief review of phase transitions and their role in explaining biological processes ranging from collective behavior in animal flocks to neuronal firing. We also highlight a new and exciting area where phase transition theory is...

Functional traits explain the consistent resistance of biodiversity to plant invasion under nitrogen enrichment

Shao-Peng Li, Jia Pu, Shu-Ya Fan, Yingtong Wu, Xiang Liu, Yani Meng, Yue Li, Wen-Sheng Shu, Jin-Tian Li & Lin Jiang
Elton’s biotic resistance hypothesis, which posits that diverse communities should be more resistant to biological invasions, has received considerable experimental support. However, it remains unclear whether such a negative diversity–invasibility relationship would persist under anthropogenic environmental change. By using the common ragweed (Ambrosia artemisiifolia) as a model invader, our four-year grassland experiment demonstrated consistently negative relationships between resident species diversity and community invasibility, irrespective of nitrogen addition, a result further supported by a meta-analysis. Importantly,...

Tropical rain forest canopy height measurements 1999 - 2018

David Clark & Deborah Clark
The distribution of canopy heights in tropical rain forests directly affects carbon storage and the maintenance of biodiversity. We report here raw field data on annually-measured canopy height distributions over an old-growth tropical rain forest landscape in Costa Rica from 1999-2018. The data were taken at 231 points on a 5 x 5 m grid in 18 0.50 ha plots that were initially sited with a stratified random design across local gradients of soil nutrients...

Canopy height distributions and estimated above-ground biomass across a tropical rain forest landscape in Costa Rica, 1992-2018

David Clark, Deborah Clark & James Kellner
This publication presents four related data sets that describe canopy height distributions and estimated above-ground biomass across an old-growth tropical rain forest landscape at the La Selva Biological Station, Costa Rica, from 1992 – 2018. One data set contains measured forest heights that were taken annually from 1999-2018 at 231 points per plot in 18 0.50 ha forest inventory plots (9 plots in 1999, 18 thereafter). The second data set contains data from an annual...

Stem boring and ant occupation of six Brazilian Cerrado trees

Robert Marquis
Wood-boring beetle larvae act as ecosystem engineers by creating stem cavities that are used secondarily as nests by many arboreal ant species. Understanding the heterogeneity and distribution of available cavities and their use by ants is therefore key to understanding arboreal ant community assembly and diversity. Our goals were to quantify the abundance and diversity of beetle-produced cavity resources in a tropical canopy, reveal how ants use these resources, and determine which characteristics of the...

Biweekly fine litterfall in the 18 CARBONO Project plots, La Selva Biological Station, October 1997-October 2018

Deborah Clark
This publication presents the 21-year record of fine-litterfall (leaves, reproductive materials, twigs < 1 cm diameter) in the 18 plots of the CARBONO Project in the old-growth tropical rainforest at La Selva Biological Station, Costa Rica. The CARBONO Project (1997-2018) was a multidisciplinary long-term research program to quantify forest carbon cycling at the landscape scale in the old-growth upland forest. The dataset is complete and has been through extensive qa/qc based on internal checks and...

Supplemental information for: Annual tropical-rainforest productivity through two decades: Complex responses to climatic factors, CO2 and storm damage

Deborah A. Clark, David B. Clark & Steven F. Oberbauer
The supplemental files in this deposition contribute additional information useful for understanding the analyses in the associated manuscript. Two files contain the annual (CARBONO Project measurement-year) data for productivity and for environmental conditions that were analyzed in the paper. The annual productivity metrics were derived from the CARBONO Project litterfall and tree-growth data that were provided and documented in prior Dryad data depositions. A third file in this deposition provides the daily data underlying the...

Two decades of annual landscape-scale tree growth and dynamics in old-growth tropical rainforest in the CARBONO Project, La Selva Biological Station, 1997-2018

Deborah Clark & David Clark
Here we present the complete data series from a 21-yr study of the annual growth and dynamics of trees, palms and lianas in the old-growth tropical rainforest at the La Selva Biological Station in Costa Rica. These observations were part of the CARBONO Project, a multidisciplinary team study of forest carbon cycling. The project was designed to assess forest processes at the landscape scale by sampling with replication across the within-landscape edaphic heterogeneity typical of...

Data from: Equivalent learning, but unequal participation: male bumble bees learn comparably to females, but participate in cognitive assessments at lower rates

Matthew Austin, Tian Manning, Kamau MuseMorris & Aimee Dunlap
Sex-specific cognitive abilities are well documented. These can occur when sexes engage in different ecological contexts. Less known is whether different ecological contexts can also drive sex-specific participation rates in behavioral tests. Here, we explore this question in bumble bees, a group of eusocial insects where worker females and males exhibit stark socioecological differences. Among myriad colony maintenance tasks, workers forage for themselves and developing brood, while males forage only for themselves while mate-searching. Following...

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