Activities

Drought-Net Activities

The Drought-Net Research Coordination Network (RCN) - funded by the US National Science Foundation – is aimed at advancing understanding of how and why terrestrial ecosystem may differ in their sensitivity to drought. The Drought-Net RCN brings together an international cadre of scientists to conduct two complementary research activities:

  1. Enhancing Existing Experiments (EEE) – a network of existing precipitation manipulation/drought experiments across the globe.
  2. The International Drought Experiment (IDE) - a new international network of coordinated drought experiments.

Synthesis of data from these two activities will be conducted by Drought-Net participants, with the ultimate goal of improving mechanistic understanding of terrestrial ecosystem sensitivity to drought.

Drought-net activities

Drought-Net Membership

Drought-Net membership is open to scientists who are committed to initiating and maintaining an IDE site, registering their existing precipitation manipulation experiment(s) with EEE, and/or furthering network goals in other substantive ways.

Register to Participate

International Drought Experiment

Allmend Brachy

International Drought Experiment

Allmend Ovina

International Drought Experiment

Bayreuth_DroughtNet

Enhancing Existing Experiment

Bayreuth_EVENT I

Enhancing Existing Experiment

Bayreuth_EVENT II

Basic hypotheses:

Enhancing Existing Experiment

Bayreuth_SIGNAL

Enhancing Existing Experiment

Bivens Arm invasion x drought

see Alba et al 2017 for details

International Drought Experiment

Brandbjerg

International Drought Experiment

Brookdale MB IDE

International Drought Experiment

Casper Mountain Science School

International Drought Experiment

Chacra Experimental Patagones

International Drought Experiment

Ciempozuelos

International Drought Experiment

Cowichan Preserve

International Drought Experiment

CredoJ

International Drought Experiment

CredoM

International Drought Experiment

DNN Freiburg

International Drought Experiment

Docker Plains

Enhancing Existing Experiment

DRI-Grass

Active rainfall manipulation involving five treatments in sheltered plots (each with 6 replicates):

Ambient

+50%

-50%

Altered frequency (one rain event every 3 weeks, representing ambient rainfall during that period)

Summer drought (typically Dec-end Feb, each Australian summer)

International Drought Experiment

DroughtAct Limpopo

International Drought Experiment

EDGE Erguna

International Drought Experiment

EDGE Hill Tara

International Drought Experiment

EDGE Sheila MuRen

International Drought Experiment

EDGE Urat

International Drought Experiment

EDGE Xilinhot-Leymus chinensis

International Drought Experiment

EDGE Xilinhot-Stipa grandis

International Drought Experiment

Environmental Sciences Western

International Drought Experiment

Ethabuka_DNB

International Drought Experiment

Ethabuka_DNU

International Drought Experiment

Falls Creek

Enhancing Existing Experiment

France-Puéchabon

Enhancing Existing Experiment

Garraf

International Drought Experiment

Hardware Ranch

International Drought Experiment

Haverøya

International Drought Experiment

Hubbard Brook Experimental Forest LTER

International Drought Experiment

Jena

International Drought Experiment

Jilpanger

Enhancing Existing Experiment

Jornada LTER

The objectives of this long-term study are: (1) to assess the effects of directional and prolonged changes in precipitation amount and variability on population, community and ecosystem processes; (2) to elucidate the mechanisms behind those changes, and finally (3) to predict the future state of drylands functioning under novel climate conditions.

Enhancing Existing Experiment

Jornada LTER

The objectives of this long-term study are: (1) to assess the effects of directional and prolonged changes in precipitation amount and variability on population, community and ecosystem processes; (2) to elucidate the mechanisms behind those changes, and finally (3) to predict the future state of drylands functioning under novel climate conditions.

International Drought Experiment

Jornada LTER

International Drought Experiment

Konza

International Drought Experiment

Kranzberg Forst

International Drought Experiment

Las Chilcas

International Drought Experiment

Lower Lac du Bois

International Drought Experiment

Lygra

International Drought Experiment

Naposta

International Drought Experiment

Noor

International Drought Experiment

North Platte

International Drought Experiment

Passo Gavia IDE

International Drought Experiment

Potrok aike

Enhancing Existing Experiment

Prades

International Drought Experiment

Purdue Wildlife Area

International Drought Experiment

Rio Mayo

International Drought Experiment

San Claudio

Enhancing Existing Experiment

Seasonal redistribution experiment

NOTE:  Shelter dimensions are actually 6.5 x 5.5 x 2.2.

Winter and summer precipitation were manipulated for 2 years with winter subplots (3 x 2 m) nested in summer plots (6.5 x 5.5 m).  

Snow was shoveled from one subplot (-100% snow) to another subplot (+100 snow).  Shelters removed 50% of throughfall in the forest from dry plots.  Wet plots received +50% of precipitation in a month (manually watered approximately every 2 weeks).

 

International Drought Experiment

Sedgwick Reserve

International Drought Experiment

Skotsvær

International Drought Experiment

Store Buøya

International Drought Experiment

Teshio Experimental Grassland

International Drought Experiment

UC Santa Cruz Drought Experiment

International Drought Experiment

Upper Lac du Bois

Enhancing Existing Experiment

US Sheep Experiment Station

We use the Gherardi et al approach, passive drought shelter, collect water and pump on to irrigated plots.

We record community composition with individual-level mapping, which gives us demographic data, but means our community level data are a little "nonstandard" (some life forms represented as canopy cover, others basal cover, others just density).

International Drought Experiment

Validate

International Drought Experiment

Wombat State Forest

International Drought Experiment

Wytham RainDrop

International Drought Experiment

Yarramundi