This README.txt file was generated on 2022-10-28 by Nan Hu


GENERAL INFORMATION

1. Title of Dataset: Data from: Ocean acidification and predation risk, in isolation and in combination, show strong effects on marine mussels

2. Date of data collection: 
	2020 for file 1 
	2021 for file 2


DATA & FILE OVERVIEW

1. Description of dataset

These data were generated to investigate how ocean acidification and predation risk in isolation and combination affect inducible defenses of blue mussels, and to examine the interaction types between ocean acidification and predation risk. 


2. File List: 
	File 1 Name: 211128dataset.csv
	File 1 Description: inducible traits of blue mussels including shell thickness, shell length, shell mass, tissue mass and shell strength

	File 2 Name: Code Proceedings B
	File 2 Description: R code of analysis

	
	
METHODOLOGICAL INFORMATION

File 1: We performed a common garden experiment where juveniles of blue mussels with different historical contact with crabs were exposed to either a control environment, crab chemical cues, low pH (as a proxy for ocean acidification), or a combination of low pH and crab cue. After 120 days raising, we measured the final shell length, shell thickness, shell mass, tissue mass and shell strength of blue mussels.

File 2: ANCOVA models run in R as well as plotting codes of ggplot2.


DATA-SPECIFIC INFORMATION FOR: 211128dataset.csv

1. Number of variables: 12

2. Number of cases/rows: 356

3. Variable List: 
	tank：identity of each tank for specify random effects in ANCOVA models
	population: 2 levels, east and west mussels
	pH: 2 levels, normal and low pH
	crab: 2 levels, absence and presence
	treatment: Experimental treatments including Control, low pH and crab cue, and combination
	initial length
	shell length: final (after experiments) shell length of snails
	shell mass: final shell mass
	tissue mass: final soft tissue mass
	shell strength
	shell thickness