An ecosystem (or ecological system) consists of all the organisms and the physical environment with which they interact. These biotic and abiotic components are linked together through nutrient cycles and energy flows. Energy enters the system through photosynthesis and is incorporated into plant tissue. By feeding on plants and on one another, animals play an important role in the movement of matter and energy through the system. They also influence the quantity of plant and microbial biomass present. By breaking down dead organic matter, decomposers release carbon back to the atmosphere and facilitate nutrient cycling by converting nutrients stored in dead biomass back to a form that can be readily used by plants and microbes.

Ecosystems are controlled by external and internal factors. External factors such as climate, parent material which forms the soil and topography, control the overall structure of an ecosystem but are not themselves influenced by the ecosystem. Internal factors are controlled, for example, by decomposition, root competition, shading, disturbance, succession, and the types of species present. While the resource inputs are generally controlled by external processes, the availability of these resources within the ecosystem is controlled by internal factors. Therefore, internal factors not only control ecosystem processes but are also controlled by them. (Full article...)

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Nature, in the broadest sense, is the physical world or universe. "Nature" can refer to the phenomena of the physical world, and also to life in general. The study of nature is a large, if not the only, part of science. Although humans are part of nature, human activity is often understood as a separate category from other natural phenomena.

The word nature is borrowed from the Old French nature and is derived from the Latin word natura, or "essential qualities, innate disposition", and in ancient times, literally meant "birth". In ancient philosophy, natura is mostly used as the Latin translation of the Greek word physis (φύσις), which originally related to the intrinsic characteristics of plants, animals, and other features of the world to develop of their own accord.

The concept of nature as a whole, the physical universe, is one of several expansions of the original notion; it began with certain core applications of the word φύσις by pre-Socratic philosophers (though this word had a dynamic dimension then, especially for Heraclitus), and has steadily gained currency ever since. (Full article...)

Sergei Nikolaievich Winogradsky ForMemRS (or Vinohradsky; published under the name of Sergius Winogradsky or M. S. Winogradsky from Ukrainian: Сергій Миколайович Виноградський Russian: Сергей Николаевич Виноградский 1 September 1856 – 25 February 1953) was a Ukrainian microbiologist, ecologist and soil scientist who pioneered the cycle-of-life concept. Winogradsky discovered the first known form of lithotrophy during his research with Beggiatoa in 1887. He reported that Beggiatoa oxidized hydrogen sulfide (H₂S) as an energy source and formed intracellular sulfur droplets. This research provided the first example of lithotrophy, but not autotrophy.

His research on nitrifying bacteria would report the first known form of chemoautotrophy, showing how a lithotroph fixes carbon dioxide (CO₂) to make organic compounds. (Full article...)

• ... that ecological speciation can give rise to new species by the way animals interact with their environment and each other?
• ... that gynaecologist Oon Chiew Seng, who was diagnosed with dementia in 2013, was the founding chairperson of the first dementia home in Singapore?
• ... that Enriqueta Medellín, a Mexican surgeon, has an ecological center and environmental prize named after her in the state of Aguascalientes?
• ... that PlantSims, human–plant hybrids in The Sims 2: Seasons, have been studied as examples of ecofeminism and deep ecology?
• ... that King Gizzard & the Lizard Wizard's "cli-fi" thrash metal album addresses a mix of current ecological threats and attempts to find another planet to live on?
• ... that ancient Roman gynecologists believed that menstrual blood could be used to drive dogs insane?

“	Nearly 97% of the world's water is salty or otherwise undrinkable. Another 2% is locked in ice caps and glaciers. Only 1% can be used for all agricultural, residential, manufacturing, community and personal needs.	”
	—American Water Works Association, National Drinking Water Week

• April 23: European Union to reduce carbon emissions by 55% of 1990 levels by 2030
• November 27: Wikinews interviews Craig Farquharson, Liberal Democrat candidate for 2020 Groom by-election
• November 27: Wikinews interviews Sandra Jephcott, Sustainable Australia candidate for 2020 Groom by-election
• December 14: Greta Thunberg named 2019 Time Person of the Year
• November 23: Researchers break down deaths due to power plant pollution in the United States
• November 21: Slippery business: Materials scientists invent new coating for self-cleaning, water-efficient toilets
• October 19: Northern Arapaho Tribe welcomes buffalo herd in Wyoming, United States
• October 12: Scientists describe how 'upside-down rivers' of warm water break Antarctica's ice shelf
• October 5: Voracious fish defend coral reefs against warming, say scientists
• September 8: Scientists report skyrocketing phytoplankton population in aftermath of Kīlauea eruption

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• November 5, 2009: "New ocean forming in African desert."

The Journal of Ecology is a bimonthly peer-reviewed scientific journal covering all aspects of the ecology of plants. It was established in 1913 and is published by Wiley-Blackwell on behalf of the British Ecological Society. The Journal of Ecology publishes papers on plant ecology (including algae) in both terrestrial and aquatic ecosystems. In addition to population and community ecology, articles on biogeochemistry, ecosystems ecology, microbial ecology, physiological plant ecology, climate change, molecular genetics, mycorrhizal ecology, and the interactions between plants and organisms such as animals or bacteria, are published regularly. (Full article...)