🌲 Ecology: BioHumor & Memes

Lindeman's 10% law states that only ~10% of energy transferred between trophic levels is incorporated into biomass, with 90% dissipated as respiratory heat and waste.

Invasive species exploit ecological release from co-evolved predators, pathogens, and competitors, rapidly displacing native biodiversity.

Keystone species exert disproportionate community influence relative to their biomass; Robert Paine's sea otter/urchin/kelp paradigm demonstrated top-down trophic cascades.

Mutualism benefits both interacting species (+/+); obligate mutualisms (e.g., coral-zooxanthellae, figs-fig wasps) are essential for the survival of both partners.

Verhulst logistic population models incorporate environmental resistance term (K - N)/K, causing per capita growth rate to decelerate as density approaches carrying capacity K.

Biological nitrogen fixation by diazotrophs utilizes oxygen-sensitive nitrogenase requiring 16 ATP per N2 fixed, protected by plant leghemoglobin.

G.F. Gause's 1934 experiments with Paramecium aurelia and P. caudatum demonstrated that complete ecological competitors cannot stably coexist on a single limiting resource.

Biomagnification occurs when lipophilic, non-biodegradable toxins accumulate along food chains because trophic efficiency for calories is ~10% while toxin retention is ~100%.

Primary ecological succession begins in abiotic environments devoid of soil, progressing from pioneer species (lichens/bryophytes) to seral stages and climax communities.

The reintroduction of apex predator grey wolves to Yellowstone National Park triggered an iconic behavioral trophic cascade that restored vegetation and stabilized riverbanks.

Amphiprion clownfish acquire a mucosal coating lacking the chemical triggers that discharge sea anemone cnidocytes, enabling mutualistic protection.

Batesian mimicry occurs when an edible, harmless mimic evolves resemblance to an unpalatable, aposematic model species to deceive shared visual predators.