National Center for Ecological Analysis and Synthesis

Search

Search Results

1761-1770 of 6285
  1. Publication

    Comprehensive evaluation of genetic population structure for anadromous river herring with single nucleotide polymorphism data

    Anthropogenic activities are placing increasing pressure on many species, particularly those that rely on more than one ecosystem. River herring (alewife, Alosa pseudoharengus and blueback herring, A. aestivalis collectively) are anadromous fishes that reproduce in rivers and streams of eastern North America and migrate to the western Atlantic Ocean. Here, we use data from single nucleotide polymorphisms (SNPs) to provide a comprehensive analysis of population structure for both species of river herring throughout their native ranges.

    Access Product View Project »
  2. Publication

    A Climate Science Regional Action Plan for the Gulf of Alaska

    Large changes in climate are expected in the U.S. Gulf of Alaska (GOA) in the coming decades. Projected changes include warming of ocean waters, decreases in ocean pH, sea level rise, changes in ocean circulation and stratification, and potential concomitant changes in species distributions, ecosystem productivity, and food-web structure. While the nature of physical changes is clear, such as warming and ocean acidification, ecosystem responses to changing physical conditions are uncertain because it is unknown which of several forcing factors will be dominant.

    View Project »
  3. Publication

    Pink Salmon induce a trophic cascade in plankton populations in the southern Bering Sea and around the Aleutian Islands

    We examined the hypothesis of top‐down (predator) control of plankton populations around the Aleutian Islands and in the southern Bering Sea using a 15 year time series (2000–2014) of plankton populations sampled during summer by Continuous Plankton Recorders. Our analyses reveal opposing biennial patterns in abundances of large phytoplankton and copepods. This pattern is likely caused by the predation pressure on copepods from biennially abundant eastern Kamchatka Pink Salmon that results in a trophic cascade.

    Access Product View Project »
  4. Publication

    An experiential, adaptive, inexpensive, and opportunistic approach to research capacity building in the tropics

    Based on intensive field courses on tropical forest management and conservation in Belize, Guyana, Indonesia, and Mexico, we recommend a pedagogical approach designed to help fill scientific mentor gaps where they impede publication by relatively inexperienced scientists. Participants in these 8–12 day field sessions were provided what instructors judged to be novel research topics but then were tasked with refining hypotheses, developing and implementing field studies, analyzing data, rehearsing formal oral presentations, and preparing complete manuscript drafts.

    Access Product View Project »
  5. Publication

    Avoiding the ecological limits of forage fish for fed aquaculture

    Aquaculture is supporting demand and surpassing wild-caught seafood. Yet, most fed aquaculture species (finfish and crustacea) rely on wild-captured forage fish for essential fatty acids and micronutrients, an important but limited resource. As the fastest growing food sector in the world, fed aquaculture demand will eventually surpass ecological supply of forage fish, but when and how best to avoid this ecological boundary is unclear.

    Access Product View Project »
  6. Publication

    The global flood protection savings provided by coral reefs

    Coral reefs can provide significant coastal protection benefits to people and property. Here we show that the annual expected damages from flooding would double, and costs from frequent storms would triple without reefs. For 100-year storm events, flood damages would increase by 91% to $US 272 billion without reefs. The countries with the most to gain from reef management are Indonesia, Philippines, Malaysia, Mexico, and Cuba; annual expected flood savings exceed $400 M for each of these nations.

    Access Product View Project »
  7. Publication

    Applied Time Series Analysis with R (2nd Edition)

    Many data include time or have longitudinal dimensions. When these data include an index of time, i.e., measures at regular or periodically successive intervals, statistics that use time sequencing in some capacity are appropriate (Senin 2009). There are at least two major categories of statistics – ‘time series analysis’ to examine trends and address potential periodicity in the data and ‘time series forecasting’ that incorporates time into models with the intent of predicting future outcomes (Senin 2009).

    Access Product
  8. Publication

    A funder-imposed data publication requirement seldom inspired data sharing

    Growth of the open science movement has drawn significant attention to data sharing and availability across the scientific community. In this study, we tested the ability to recover data collected under a particular funder-imposed requirement of public availability. We assessed overall data recovery success, tested whether characteristics of the data or data creator were indicators of recovery success, and identified hurdles to data recovery. Overall the majority of data were not recovered (26% recovery of 315 data projects), a similar result to journal-driven efforts to recover data.

    Access Product View Project »
  9. Publication

    R Package called tsvr

    R package called "tsvr", maintainer is Daniel Reuman, see github.com/reumandc/tsvr

    View Project »
  10. Publication

    R Package called mms

    R package called "mms", maintainer is Daniel Reuman, see https://github.com/reumandc/mms

    View Project »