Spreading Dead Zones and Consequences for Marine Ecosystems.¶
Diaz, R. J., & Rosenberg, R. (2008). Spreading Dead Zones and Consequences for Marine Ecosystems. Science, 321(5891), 926-929.
Cited by¶
4 citations across 4 artifacts.
Each citation links to the sentence it supports in the citing article.
Primes¶
- Bloom And Bust Cycle
- Marine eutrophication supplies the canonical case — a nutrient pulse fuels an algal bloom, the bloom exhausts its niche and collapses, and bacterial decomposition of the dead biomass depletes the water column's oxygen, killing fish and benthic life over an area larger than the original bloom.
This sourceEstablishes the eutrophication arc: enhanced primary production accumulates particulate organic matter, and as planktonic algae die microbial decomposition consumes dissolved oxygen in bottom waters, producing hypoxic dead zones reported from more than 400 systems over a total area of more than 245,000 km2; recovery from severe hypoxia takes years and recurring hypoxia can establish a persistent (hysteresis-like, threshold) altered state. NB: this review supports the decomposition->oxygen-depletion->dead-zone mechanism and the macro-scale figures, but does NOT contain the prime's specific bloom-dynamics numbers (a ~20-fold growth in ten days, a three-to-five-day collapse, an order-of-magnitude loss comparison, or peak-vs-average oxygen-debt scaling) -- see prose flags on markers 556, 558, 559.
- Marine eutrophication supplies the canonical case — a nutrient pulse fuels an algal bloom, the bloom exhausts its niche and collapses, and bacterial decomposition of the dead biomass depletes the water column's oxygen, killing fish and benthic life over an area larger than the original bloom.
- Eutrophication
- The secondary resource the bloom depletes is dissolved oxygen — when the bloom dies and sinks, decomposing bacteria consume bottom-water oxygen far faster than mixing replenishes it, producing hypoxia.
This sourceDocuments the formation of hypoxic dead zones from decomposition of nutrient-driven blooms depleting bottom-water oxygen.
- The secondary resource the bloom depletes is dissolved oxygen — when the bloom dies and sinks, decomposing bacteria consume bottom-water oxygen far faster than mixing replenishes it, producing hypoxia.
- Mixed Layer
- In a prolonged calm, the stirring (wind) drops, the layer stratifies internally, surface water warms and seals off, and vertical exchange collapses — the stagnation failure mode that produces summer oxygen-depleted dead zones and fish die-offs.
This sourceStratification-induced collapse of vertical mixing producing oxygen-depleted hypoxic dead zones.
- In a prolonged calm, the stirring (wind) drops, the layer stratifies internally, surface water warms and seals off, and vertical exchange collapses — the stagnation failure mode that produces summer oxygen-depleted dead zones and fish die-offs.
- Overshoot and Collapse
- That decomposition depletes the secondary resource, dissolved oxygen: bacterial respiration consumes the water column's oxygen faster than it can be replenished, and it is the resulting hypoxia — not the nutrient directly — that kills fish and benthic life, creating a dead zone.
This sourceBacterial decomposition of algal blooms depletes dissolved oxygen, and the resulting hypoxia—not the nutrient directly—creates dead zones.
- That decomposition depletes the secondary resource, dissolved oxygen: bacterial respiration consumes the water column's oxygen faster than it can be replenished, and it is the resulting hypoxia — not the nutrient directly — that kills fish and benthic life, creating a dead zone.
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