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Data from: Spring temperature predicts upstream migration timing of invasive Sacramento pikeminnow within its introduced range

Cite this dataset

Georgakakos, Philip; Dralle, David; Power, Mary (2024). Data from: Spring temperature predicts upstream migration timing of invasive Sacramento pikeminnow within its introduced range [Dataset]. Dryad. https://doi.org/10.5061/dryad.2280gb61b

Abstract

Rapid climate change and invasive species introductions threaten ecological communities across the globe. Freshwaters are particularly vulnerable and impacted, especially when these stresses coincide. We document the migration of an invasive piscine predator, the Sacramento pikeminnow (Ptychocheilus grandis), within its introduced range, the South Fork Eel River, California, USA. Snorkel surveys and temperature monitoring in 2015–2019 showed that pikeminnow migrate upstream during spring and early summer, with earlier migration in warmer years. We developed a statistical temperature model to forecast the timing and extent of upstream migration by pikeminnow under varying combinations of discharge and air temperature. Modeled river temperature increased with air temperature and downstream and decreased with discharge. In years with low discharge and high air temperature, we predict pikeminnow will move upstream earlier, increasing spatial and temporal overlap in their summer range with native fishes. Managing conditions that reduce pikeminnow co-occurrence with native fishes (i.e., decreasing river temperature) could increase the amount and duration of predator-free habitat for native fishes. We predict invasive pikeminnow will have larger impacts on invaded riverine communities with global warming and increasing drought severity. Knowledge of life history and phenology, for pikeminnow and other organisms, can guide effective management as conditions change and help to limit adverse impacts of introduced organisms on native species.

README: Spring temperature predicts upstream migration timing of invasive Sacramento pikeminnow within its introduced range

https://doi.org/10.5061/dryad.2280gb61b

This study examined the relationship between the timing of pikeminnow migration and river temperature in the upper South Fork Eel River.

Description of the data and file structure

Hourly temperature data was collected with either Maxim iButtons, or Hobo temperature pendants (MS2202), and is included in the csv files "wilderness*temp.csv" and "temp_model.csv"* which are described below.

"wilderness_temp.csv"

This .csv includes temperature data from 2015-2019 collected at the well-mixed outflow of our focal study pool, Wilderness Pool (39.74075, -123.6333), located on the South Fork Eel River in the Angelo Coast Range Reserve, Mendocino Co.

The columns in this dataset include:

year: integer year

date_time:  is formatted MM/DD/YY HH:MM with the hour and minutes in 24hr clock.

temp: degrees Celsius recorded hourly.

"temp_model.csv"

This .csv includes the data used to create our temperature model for the upper South Fork Eel River. Each row on this dataset corresponds to a temperature sensor in a given year.

The columns in this dataset include:

dist: the linear distance (km) along the stream thalweg of each sensor from the confluence of the South Fork Eel and the Mainstem Eel River.

temp: Mean of hourly water temperature calculated from May 15 - July 1 of a given year. Temp column is the mean of hourly water temperature recorded on Maxim iButtons, or Hobo temperature pendants (MS2202) placed well-mixed thalweg locations on the South Fork Eel River within the Angelo Coast Range Reserve

meanairtemp: mean from May 15 - July 1 air temperature recorded at the Angelo Coast Range Reserve weather station.

meanq: the mean of stream discharge (M^3/s) from May 15 - July 1 estimated from the USGS stilling well at the southern end of the Angelo Coast Range Reserve (gage ID 114755500)

Code/Software

The accompanying annotated R script "2024_wilderness_temp.R" summarizes the temperature data and adds the timing of arrival of pikeminnow to the temperature datasets. This is the script we used to generate figures used in the manuscript, and includes statistical models for the arrival data of pikeminnow and river temperature in the upper South Fork Eel River. This code runs on R version 4.3.2 (2023-10-31), packages needed to run the script include: tidyverse, lubridate ,scales, ,RColorBrewer, lme4, lmerTest, and MuMIn. To run the script, update the locations of the associated .csv files on your computer.

Methods

This data consists of 1) Daily temperature data for Wilderness Lodge Pool 2) arrival time of Sacramento pikeminnow at Wilderness Lodge Pool, and 3) Statistical temperature model that includes discharge, river position, and air temperature. For detailed methods and site descripts see methods seciton and supplemental information of associated manuscript. 

Funding

National Science Foundation, Award: CZP EAR-13331940

University of California, Award: Mildred E. Mathias Award, Natural Reserve System

University of California, Carol Baird Graduate Student Award

University of California, UC Institute for the Study of Ecological Effects of Climate Impacts