Biomes are large ecosystems that have similar precipitation and temperatures
Biomes can be defined based upon two abiotic factors:
Annual average temperature (AAT)
Annual average precipitation (AAP)
Below is a Whittaker Graph which plots AAT on the x-axis, and the AAP on the Y-axis
This is a simplified scatter plot of the possible ecosystems on Earth defined by AAT and AAP
Whittaker drew lines around data to indicate how each biome is defined within this eco-space.
What factor define a biome?
How would a grassland change if precipitation in an area decreased significantly over years?
What changes might you expect in a taiga after decades of increased annual temperatures?
Looking at the Whittaker Graph, what is the major factor limiting tree growth: temperature or precipitation? Explain...
Prescribed burning helps store forest carbon in big fire-resistant Sierra Nevada trees (Phys.org 17Nov2025)
└Carbon costs of different pathways for reducing fire hazard in the Sierra Nevada (Zhu et al., 2025)
Mixing tree species does not always make forests more drought-resilient (Phys.org 18Sep2025)
└Serrano‐León et al. (2025) Multiyear Drought Strengthens Positive and Negative Functional Diversity Effects on Tree Growth Response
Using only genomics and a one-time tree count, a new model can accurately predict a forest's future (Phys.org 18Sep2025)
└O'Dwyer (2025) Genomic demography predicts community dynamics in a temperate montane forest
Invasive plants are rapidly changing tropic ecosystems across three continents (Phys.org 11Sep2025)
└Mungi et al. (2025) Alien plants and novel ecosystems in the Greater Tropics
Biodiversity matters in every forest, but even more in wetter ones (Phys.org 4Aug2025)
└Zheng et al. (2025) Neighbourhood diversity increases tree growth in experimental forests more in wetter climates but not in wetter years
Nitrogen in forests and grasslands overestimated, new global analysis shows (Cary Institute of Ecosystem Studies 16Jul2025)
└Ely (2025) Global terrestrial nitrogen fixation and its modification by agriculture
Resolving the debate over forest fragmentation's impact on ecosystem resilience (Phys.org 9Jul2025)
└Su et al. (2025) Pervasive but biome-dependent relationship between fragmentation and resilience in forests
Most tree species face serious climate threat even under modest warming, study reveals (Phys.org 24Jun2025)
└Boonman et al. (2025) High tree diversity exposed to unprecedented macroclimatic conditions even under minimal anthropogenic climate change
Tree rings reveal increasing rainfall seasonality in the Amazon (Phys.org 17Jun2025)
└Cintra et al. (2025) Tree ring isotopes reveal an intensification of the hydrological cycle in the Amazon
Native forests sink more carbon than expected, inverse modeling reveals (Phys.org 17Jun2025)
└Bukosa et al. (2025) Inverse modelling of New Zealand's carbon dioxide balance estimates a larger than expected carbon sink
Unexpectedly deep roots in plants unearth new questions about soil carbon storage (Phys.org 17Jun2025)
└Malhotra et al. (2025) Continental-scale relationships of fine root and soil carbon stocks hold in grasslands but not forests
Colonization cleared 95% of these woodlands—Indigenous cultural burning is bringing it back (Phys.org 17Jun2025)
└Bowd et al. (2025) Plant Responses to a Re‐emergence of Cultural Burning in Long‐Unburnt, Threatened Temperate Woodlands
Long-term study reveals native seeding controls annual—but not perennial—invasive plants in sand grassland restoration (Phys.org 17Jun2025)
└Sáradi et al. (2025) Restorative seeding controls annual invasive species, but perennials can thrive in the long term despite treatments in sand grassland restoration
Grassland ecosystems show abrupt changes when nitrogen fertilization exceeds key threshold (Phys.org 16Jun2025)
└Bagousse-Pinguet et al. (2025) Thresholds of functional trait diversity driven by land use intensification
Life from oceans to savannas explained with one single rule (Phys.org, 4Jun2025)
└Bernardo-Madrid et al. (2025) A general rule on the organization of biodiversity in Earth’s biogeographical regions
Invasive South African Gazania poses huge risk in Australia (Phys.org 4Jun2025)
└Adnan et al. (2025) Seeds of success: seed biology and germination response of Gazania weed in Australia
Research shows how solar arrays can aid grasslands during drought (ScienceDaily 2Jun2025)
└Sturchio & Knapp (2025) Evidence of photovoltaic aridity mitigation in semi-arid grasslands.
Extreme drought can disrupt grassland stability, weakening dominant grasses' influence (Phys.org 27May2025)
└Luo et al. (2025) Extreme Drought Increases the Temporal Variability of Grassland Productivity by Suppressing Dominant Grasses
Faced with drought, fertilizer helps grasslands grow strong (Phys.org 19May2025)
└Bondaruk et al. (2025) Aridity modulates grassland biomass responses to combined drought and nutrient addition
Nutrient additions amplify grassland response to rainfall, study finds (Phys.org 17 Apr2025)
└Fay et al. (2025) Interactions among nutrients govern the global grassland biomass–precipitation relationship
A long wait for pollinators: Restored grasslands need 75+ years for full biodiversity recovery, study finds (Phys.org 13Mar2025)
└Hirayama et al. (2025) Long-term management is required for the recovery of pollination networks and function in restored grasslands
Grasslands are responding to climate change almost in real time, according to research (Phys.org 16Oct2024)
└Zhu et al. (2024) Rapid shifts in grassland communities driven by climate change
Grassland study shows that elevated levels of CO₂ nearly tripled species losses attributed to nitrogen pollution (Phys.org 16Oct2024)
└Reich et al. (2024) High CO2 dampens then amplifies N-induced diversity loss over 24 years
A rare orchid survives on a few tracts of prairie (Phys.org 24Aug2024)
Danish grasslands are behaving strangely and researchers don't know why (Phys.org 21Feb2024)
└ Damgaard (2024) Decline in large-seeded species in Danish grasslands over an eight-year period
Plant diversity stabilizes soil temperature (Phys.org 6Dec2023)
└Huang et al. (2023) Enhanced stability of grassland soil temperature by plant diversity
Afforestation carbon sequestration projects found to be less effective than grasses in tropical savannas (Phys.org 29Aug2023)
└Zhao et al. (2023) Soil carbon in tropical savannas is mostly derived from grasses
Where the bison could roam (New York Times 10Jan2023)
Reintroducing bison on tallgrass prairie doubles plant diversity (Successful Farming 1Sep2022)
Reconstructing Two Centuries of Midwest Prairie Fire History (In Defense of Plants 28Nov2021)