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

Enhancing Existing Experiment

Alcornocales Natural Park

The rainfall exclusion experiment of the Alcornocales Natural Park (southern Spain) involves two different sites about 5 km apart: Gamir and Marrufo. Gamir is a closed forest dominated by the Mediterranean oaks Quercus suber and Quercus canariensis, whereas Marrufo is an open woodland dominated by Quercus suber and Olea europaea var. sylvestris. Both forests are invaded by the exotic soil-borne pathogen Phytophthora cinnamomi. 

International Drought Experiment

Allmend Brachy

International Drought Experiment

Allmend Ovina

International Drought Experiment

Ayora Experimental Station

International Drought Experiment

Azi

International Drought Experiment

BadDrought

International Drought Experiment

Bahía Cracker

International Drought Experiment

Bamboo Drought China

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

Brackenridge Field Laboratory

International Drought Experiment

Brandbjerg New Setup 2016

International Drought Experiment

Brandbjerg Original Setup 2005-2013

International Drought Experiment

Broken Hill

International Drought Experiment

Brookdale MB IDE

International Drought Experiment

Casper Mountain

International Drought Experiment

Cedar Creek Savanna

International Drought Experiment

Cedar Creek Trait

International Drought Experiment

Chacra Experimental Patagones

International Drought Experiment

Charleville

International Drought Experiment

Ciempozuelos

International Drought Experiment

Cobar

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

Dry Mixed Grass Prairie Ecoregion

International Drought Experiment

Ea. La Guillermina

International Drought Experiment

EDGE Erguna

International Drought Experiment

EDGE Sheila MuRen

International Drought Experiment

EDGE Sher Tara

International Drought Experiment

EDGE Urat

International Drought Experiment

EDGE Xilinhot-Leymus chinensis

International Drought Experiment

EDGE Xilinhot-Stipa grandis

International Drought Experiment

EEA-UFRGS

International Drought Experiment

EGCN Bangoin

International Drought Experiment

EGCN Dangxiong

International Drought Experiment

EGCN Haibei

International Drought Experiment

EGCN Hongyuan

International Drought Experiment

EGCN Hulun Buir

International Drought Experiment

EGCN Naqu

International Drought Experiment

EGCN Urat

International Drought Experiment

EGCN Xilinhot

International Drought Experiment

EGCN Yanchi

International Drought Experiment

EGCN Youyu

Enhancing Existing Experiment

Elizabeth Woods

  Present are two shelters and two control sites.  Based on a mycorrhizal associated framework, one treatment and control are dominated by Quercus rubra and Carya ovata; ectomycorrhizal associated trees.  The other treatment and control sites are dominated by Acer saccharum and Liriodendron tulipifera; arbuscular mycorrhizal associated trees.  

International Drought Experiment

Environmental Sciences Western

International Drought Experiment

Ethabuka_DNB

International Drought Experiment

Ethabuka_DNU

International Drought Experiment

Falls Creek

International Drought Experiment

Fenghuoshan

Enhancing Existing Experiment

Foxton Fife

 

Enhancing Existing Experiment

France-Puéchabon

Enhancing Existing Experiment

Garraf

International Drought Experiment

Guaribas

International Drought Experiment

Hardware Ranch

International Drought Experiment

Haverøya

International Drought Experiment

HO IDE

International Drought Experiment

Hoelstein

International Drought Experiment

Hongyuan

International Drought Experiment

Hubbard Brook Experimental Forest LTER

International Drought Experiment

HY IDE

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

KAEFS-OK

International Drought Experiment

Kinsella

International Drought Experiment

Kiskunsag

International Drought Experiment

Konza

International Drought Experiment

Kranzberg Forst

International Drought Experiment

Las Chilcas

International Drought Experiment

LC North Facing IDE

International Drought Experiment

LC South Facing IDE

Enhancing Existing Experiment

Loma Ridge

This experiment is part of the Loma Ridge Global Change Experiment, established by Michael Goulden in 2007. There are two ecosystem types, grassland and shrubland, with more studies completed in the grassland. The plots in the shrubland are 4 times the area and twice the height of the grassland. In 2014, half of the manipulated plots were designated "recovery" plots and the precipitation manipulation was ended. This experiment is also split-plot factorial with nitrogen addition (60 kg/ha/yr).

International Drought Experiment

Los Cerrillos

International Drought Experiment

Los pozos

International Drought Experiment

Lower Lac du Bois

International Drought Experiment

Lygra

International Drought Experiment

Mar Chiquita

International Drought Experiment

Matta LTER

International Drought Experiment

Mattheis

International Drought Experiment

meadow_Stubai

International Drought Experiment

Middle Ebro Valley

International Drought Experiment

Milparinka

Enhancing Existing Experiment

Mols

The site is a lowland heathland on sandy moraine co-dominated by the shrub Calluna vulgaris and the grass Deschampsia flexuosa.

It is 57 m a.s.l. and 3 km from the sea. Precipitation at the site is 550 mm (30 yr mean), annual temperature is 7.7 °C (30 yr. mean) (average January 1.7 °C, average July 17.5 °C). 

Nitrogen deposition is in the low end of the range within the INCREASE network with c. 13 kg N/ha/yr (3 yr mean in wet deposition).

International Drought Experiment

Monte Oriental

International Drought Experiment

Mt. gongga

International Drought Experiment

Naposta

International Drought Experiment

Noor

International Drought Experiment

North Platte

International Drought Experiment

Nyngan

Enhancing Existing Experiment

Oldebroek

Drought manipulations as described have been carried out starting 1999 until 2017 (18 years), while 1998 was a pretreatment year. Plans for the next future (starting 2019) are to transform the active manipulation into a passive, drought-net design. This would mean that the "old" manipulation of 3 months no precipitation (an average decrease of 20% on an annual basis), would change to a year long decrease in precipitation of 20% or any other percentage (not yet decided).

International Drought Experiment

Onefour

International Drought Experiment

ORDESA

International Drought Experiment

ORIDE Site AA

International Drought Experiment

ORIDE Site AC

International Drought Experiment

Oyen

International Drought Experiment

Passo Gavia IDE

Enhancing Existing Experiment

Pfynwald

International Drought Experiment

PINETA

International Drought Experiment

PNE IDE

International Drought Experiment

Potrok Aike

Enhancing Existing Experiment

Prades

International Drought Experiment

Purdue Wildlife Area

Enhancing Existing Experiment

Purdue Wildlife Area

 

 

International Drought Experiment

QdT North Facing IDE

International Drought Experiment

QdT South Facing IDE

International Drought Experiment

Quilpie

International Drought Experiment

Rhijnauwen

International Drought Experiment

Rio Mayo

International Drought Experiment

San Claudio

International Drought Experiment

San Pablo de Valdes

International Drought Experiment

Sangudo

International Drought Experiment

Sedgwick Reserve

International Drought Experiment

Sevilleta blue

International Drought Experiment

Sevilleta Mixed

International Drought Experiment

Shoyokh

International Drought Experiment

Skotsvær

International Drought Experiment

Sonora Agrilife Research Station

Enhancing Existing Experiment

South Coast Research Extension Center

Question: Are hydraulic traits in dominant coastal sage scrub shrub species plastic in response to altered precipitation regimes and does plasticity in these traits change the shrubs risk of drought induced mortality.

International Drought Experiment

Stavely

International Drought Experiment

Stengl Lost Pines Biological Station

International Drought Experiment

Store Buøya

International Drought Experiment

Teshio Grassland Experiment

International Drought Experiment

Twin river

International Drought Experiment

University of Saskatchewan - Biddulph

International Drought Experiment

University of Saskatchewan - Matador

International Drought Experiment

University of Wisconsin-Platteville

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