degree-day models

Knowledge graph centered on degree-day models with 72 nodes and 186 connections. Top connected: Bombus, Ligusticum porteri, Delphinium, Bombus terrestris, Bombus appositus.

Method synopsis

Calculation of cumulative growing degree days from weather station data using species-specific base temperatures, correlated with biological events through linear regression to assess temperature-dependent timing.

Synthesized from method descriptions across 3 papers using this protocol.

Procedure from a recent peer-reviewed implementation

Steps below were extracted from the most recent peer-reviewed implementation of this protocol in the corpus — Global Warming, Advancing Bloom and Evidence for Pollinator Plasticity from Long-Term Bee Emergence Monitoring (2021), Insects. Implementations in other papers (listed below) may differ.

1. Record weather and soil temperature data
   Local air temperatures and cumulative growing degree days (GDD) were obtained from nearby campus weather stations. Soil temperatures at 5 cm and 20 cm depth were manually measured at bee cemetery aggregation sites. Base temperatures of 10°C and 18°C were used for GDD calculations for spring and summer species respectively.
   Quantities: Temperature measurements at 5 cm and 20 cm soil depth, daily air temperature recordsDuration: Ongoing measurements throughout study period, manual soil measurements on specific dates (5 and 17 March 2013)Conditions: Measurements taken at nesting sites and nearby weather stations within 1.3 km
   Equipment: soil temperature sensors, campus weather stations, USU campus weather station, National Weather Service data, NRCS Soil Climate Analysis Network (SCAN) records

Typical Equipment

• campus weather stations
• National Weather Service data

Output Measurements

• cumulative GDD
• GDD correlations with emergence

Papers Using This Protocol (3)

Species Studied With This Protocol