James H. Brown
University of New Mexico
Publications 387
#1John R. Schramski (UGA: University of Georgia)H-Index: 12
#2C. Brock Woodson (UGA: University of Georgia)H-Index: 7
Last.James H. Brown (UNM: University of New Mexico)H-Index: 104
view all 5 authors...
Global food security for a population of 9 billion by 2050 depends on a complex socioeconomic and biophysical system. Current strategies involve decreasing food losses, increasing yields, and improving distribution efficiencies. Herein, we use a systems-based approach to show that contrary to a historically rising global dietary energy production (DEP: per capita calories grown or captured), food self-sufficiency at the country-level has been in a four-decade decline as the number of countries g...
#1Joseph R. Burger (Population Research Institute)H-Index: 1
#2Joseph R. Burger (Population Research Institute)
Last.Eric D. Roy (UVM: University of Vermont)H-Index: 10
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The urban transition, the increased ratio of urban to rural population globally and within countries, is a hallmark of the twenty-first century. Our analysis of publicly available data from the World Bank spanning several decades for ~ 195 countries shows that across and within nations over time, per capita Gross Domestic Product (GDP), energy use, and CO2 emissions are lowest in predominantly rural countries (rural > urban pop.), increase rapidly across urbanizing countries (rural ≈ urban pop.)...
#1John M. Grady (MSU: Michigan State University)H-Index: 4
#2Brian S. Maitner (UA: University of Arizona)H-Index: 5
Last.Anthony I. Dell (WashU: Washington University in St. Louis)H-Index: 6
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INTRODUCTION One of the most general patterns in ecology is that diversity increases toward the equator. In the ocean, however, mammal and bird richness generally peak in colder, temperate waters. This pattern is especially puzzling given the thermal stress that cold water imposes on warm-bodied endotherms, which must maintain constant, elevated body temperatures through metabolic activity. In contrast, ectothermic fish and reptiles that rely on ambient heat to regulate their body temperature sh...
#1S. K. Morgan ErnestH-Index: 28
#2Glenda M. YenniH-Index: 3
Last.Edward J. HeskeH-Index: 26
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#1James H. Brown (UNM: University of New Mexico)H-Index: 104
#2Andrew J. Dennhardt (MSU: Michigan State University)
#1Richard M. Sibly (University of Reading)H-Index: 54
#2Astrid Kodric-Brown (UNM: University of New Mexico)H-Index: 28
Last.James H. Brown (UNM: University of New Mexico)H-Index: 104
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Teleosts such as tunas and billfish lay millions of tiny eggs weighing on the order of 0.001 g, whereas chondrichthyes such as sharks and rays produce a few eggs or live offspring weighing about 2% of adult body mass, as much as 10 000 g in some species. Why are the strategies so extreme, and why are intermediate ones absent? Building on previous work, we show quantitatively how offspring size reflects the relationship between growth and death rates. We construct fitness contours as functions of...
#1Maria Dornelas (St And: University of St Andrews)H-Index: 19
#2Laura H. Antão (St And: University of St Andrews)H-Index: 2
Last.Haley Arnold (St And: University of St Andrews)H-Index: 1
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Motivation: The BioTIME database contains raw data on species identities and abundances in ecological assemblages through time. These data enable users to calculate temporal trends in biodiversity within and amongst assemblages using a broad range of metrics. BioTIME is being developed as a community-led open-source database of biodiversity time series. Our goal is to accelerate and facilitate quantitative analysis of temporal patterns of biodiversity in the Anthropocene.Main types of variables ...