Hypoxia threatens coral and sea anemone early life stages

Seawater hypoxia is increasing globally and can drive declines in organismal performance across a wide range of marine taxa. However, the effects of hypoxia on early life stages (e.g., larvae and juveniles) are largely unknown, and it is unclear how evolutionary and life histories may influence these outcomes. Here, we addressed this question by comparing hypoxia responses across early life stages of three cnidarian species representing a range of life histories: the reef-building coral Galaxea fascicularis, a broadcast spawner with horizontal transmission of endosymbiotic algae (family Symbiodiniaceae); the reef-building coral Porites astreoides, a brooder with vertical endosymbiont transmission; and the estuarine sea anemone Nematostella vectensis, a non-symbiotic broadcast spawner. Transient exposure of larvae to hypoxia (dissolved oxygen < 2 mg L-1 for 6 h) led to decreased larval swimming and growth for all three species, which resulted in impaired settlement for the corals. Cor..., , , # Data from: Hypoxia threatens coral and sea anemone early life stages

The dataset includes files for all data associated with experiments.

#### Data and file structure

#### Files 1 and 2: AFDW\_data.xlsx and .csv

These files are for data pertaining to the ash-free dry weight (AFDW; i.e., organic biomass) of larvae and juveniles as quantified from burned, dried tissue

These files have headers, which include:
-Species = species from which the data originate
-Treatment = oxygen treatment to which larvae were exposed (either normoxia or hypoxia)
-Cohort = cohort (i.e., group of larvae born at the same time) from which the data originate
-Group = experimental treatment jar (i.e., biological replicate) from which the data originate
-Life_stage = developmental/life history stage of animals at time of data collection (either larva or juvenile)
-Hours_post_treatment = hours after hypoxia treatment at which time data were collected
-AFDW_ug_mm = ash-free dry weight of animals measured in µ...