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Biome

Mangrove Forest

Also Known As Mangrove Swamp
Marine and Coastal Biomes

A biome of trees and shrubs, roughly eighty species worldwide, rooted in the coastal intertidal zone of tropical and subtropical shores, restricted to areas near the equator because mangroves cannot withstand freezing temperatures. Many mangrove species carry dense tangles of prop roots that make the trees appear to stand on stilts above the water, slowing tidal flow so fine sediment settles out, stabilizing coastlines against storms and erosion, and giving fish and other animals a nursery habitat.

Facts
Disputed
Annual Precipitation (mm)
2500 2
2500mm/year is the humid-climate classification threshold used in a Pacific/Caribbean Colombian coastal mangrove distribution study; mangroves as a whole range from semi-arid coasts receiving far less rain to superhumid Pacific sites exceeding 5000mm/year, so this is a representative documented figure, not a global mean.
Typical High Temperature (C)
29 3
29C (19C plus the source own stated maximum 10C tolerable fluctuation) is an arithmetic upper bound derived from this source own two stated figures, not a directly reported maximum; the source itself names only the survival floor and the fluctuation tolerance, not a labeled high figure.
Climate
Typical Low Temperature (C)
19 1
Mangroves are strictly tropical/subtropical; this is the survival floor the source itself states, not a seasonal low. Temperature-high-c deliberately left unfilled: secondary sources give wide, inconsistent optimal-growth ranges (20 to 38 C) with no single authoritative typical high found worth citing. Precipitation deliberately left unfilled too: mangroves grow on coasts from about 164mm/yr (arid Persian Gulf sites) to over 4000mm/yr (wet tropics), so no honest single figure exists, the same reasoning already applied to Freshwater and Marine.
Learn More
Mangrove Forest: Trees That Grow With Their Roots in the Sea

This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.

Almost no plant can survive what a mangrove tree treats as home: soil that floods with salt water on the tidal cycle, drains of oxygen when submerged, and shifts under the tree's own roots with every tide. About eighty mangrove species worldwide have solved this problem, and many of them solved it the same visible way, with a dense tangle of prop roots that lift the trunk above the waterline and make the tree look, at low tide, like it is standing on stilts. Those roots are not decorative. They slow the movement of tidal waters enough that sediment settles out and builds up the muddy bottom the forest stands on, and the still, sheltered water among the roots gives snapper, tarpon, oysters, crabs, shrimp and other species a protected place to breed, feed and grow.

A mangrove forest is a biome defined by the coast. The intertidal zone, the area where the ocean meets the land, underwater at high tide and exposed at low tide, is where it grows, on tropical and subtropical shores where slow moving water lets sediment accumulate rather than washing away. Push a mangrove forest inland past the reach of the tide, or push it into cold water, and it stops being a mangrove forest at all.

The ecological payoff of that narrow tolerance is outsized. Thick mangrove roots help the trees withstand strong winds and reduce wave energy before it reaches the shore behind them, which is a real part of why coastal communities plant and protect mangroves rather than simply admiring them. This atlas's own Sundarbans ecosystem, described by National Geographic as the world's largest mangrove forest, is the biome's own type specimen for scale.

Why Cold, Not Heat, Draws the Line Around the World's Mangroves

This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.

Most biomes in this atlas carry both a temperature ceiling and a temperature floor: the desert's heat, the tundra's cold, the temperate forest's comfortable middle. The mangrove forest does not fit that pattern cleanly, and being honest about that gap is more useful than forcing a number that does not exist. Research for this entry found a well established cold tolerance threshold: the University of Florida's own habitat requirements page for South Florida puts survival at temperatures above 19C, and states plainly that mangroves cannot tolerate a swing of more than about 10C in a short period, or any freeze at all, however brief. That single number, not a heat ceiling, is what actually draws the biome's boundary around the world, which is why mangroves stop appearing as the coastline bends away from the tropics into any latitude that sees frost.

What the research did not find was an equally honest heat ceiling or a single global rainfall figure, and this entry does not invent one. Mangroves are, if anything, remarkably heat tolerant compared to most trees, since the tropical and subtropical coasts they occupy stay warm year round; heat is simply not the constraint doing the work. Rainfall is even less uniform: a peer reviewed survey of Colombian mangrove forests found them thriving on under 500mm of rain a year on the arid Guajira Peninsula coast and on more than 7000mm a year in the super humid forests of the Pacific coast, a fourteenfold range within a single country that makes any single annual precipitation figure for the biome actively misleading rather than merely imprecise.

This is the same discipline the atlas already applies to a population figure nobody can honestly state: better an accurate half of the picture, with the gap named, than a complete looking number quietly built on nothing.

Mangrove Forest
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Fishing Cat, Species
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Knight Anole, Species
Source Wikipedia: Knight anole
Source Wikipedia: Lined seahorse
Source Mangrove cuckoo (Wikidata)
Source Manilkara zapota (Wikidata)
Source Mourning collared dove (Wikipedia)
Mudskipper, Species
Source Wikipedia: Mudskipper
Ocelot, Species
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Source Encyclopaedia Britannica
Red Mangrove, Species
Source Encyclopaedia Britannica
Source Wikipedia: Roseate Spoonbill
Source Encyclopaedia Britannica
Source Slender Seahorse (Wikipedia)
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Source Wikidata: Spotted tilapia
Termite, Species
Source Termite (Wikipedia)
Trichoplax, Species
Source Wikipedia: Trichoplax
Source Wikipedia: Cassiopea

Long-Form Articles

Sources
1. Habitat Requirements: Mangroves (Florida Museum of Natural History)
Florida Museum of Natural HistoryIntroduction
Quote, Introduction
Photo courtesy National Park Service Mangroves are tropical species, surviving at temperatures above 66° F (19° C), not tolerating fluctuations exceeding 18° F (10° C) or temperatures below freezing for any length of time.
View the Source
2. Global Distribution of Mangrove Forests and Climate (Frontiers in Forests and Global Change)
Introduction
Quote, Introduction
Brief Analysis Country-Wide Patterns The current database includes 61 sites along the Pacific coast under superhumid (total annual precipitation, P > 5,000 mm y -1 ) and humid ( P > 2,500 mm y -1 ) climates, and 52 sites along the Caribbean coasts (including oceanic and continental areas) extending over semi-humid (in Antioquia, Southwestern Caribbean), semi-arid and arid (Cordoba-Magdalena), and desert (Guajira, Northeastern Caribbean) climates (P range: < 500-< 2,500 mm y -1 ) ( Supplementary Figure 3 and Supplementary Table 1 ).
View the Source
3. Habitat Requirements (Florida Museum of Natural History, South Florida Aquatic Environments)
Florida Museum of Natural History, University of Florida
  • Introduction
    Photo courtesy National Park Service Mangroves are tropical species, surviving at temperatures above 66° F (19° C), not tolerating fluctuations exceeding 18° F (10° C) or temperatures below freezing for any length of time.
  • Tropical Climate section, temperature tolerance passage
    Mangroves are tropical species, surviving at temperatures above 66° F (19° C), not tolerating fluctuations exceeding 18° F (10° C) or temperatures below freezing for any length of time.
View the Source
Encyclopaedia Britannica
Encyclopaedia Britannica, Inc.
  • Home To: Red Mangrove
  • Home To: Saltwater Crocodile
  • Home To: Proboscis Monkey
View the Source
Caribbean Spiny Lobster (Wikidata)
WikidataHome To: Caribbean Spiny Lobster, IntroductionView the Source
Crocodile Monitor (Wikidata)
WikidataHome To: Crocodile Monitor, IntroductionView the Source
Wikipedia: Cassiopea
WikipediaHome To: Upside-down Jellyfish, IntroductionView the Source
Manilkara zapota (Wikidata)
WikidataHome To: Manilkara zapota, IntroductionView the Source
Mangrove cuckoo (Wikidata)
WikidataHome To: Mangrove cuckoo, IntroductionView the Source
Wikidata: Spotted tilapia
Home To: Spotted tilapia, IntroductionView the Source
Wikipedia: Cuban crocodile
Home To: Cuban Crocodile, Lead section
Quote, Home To: Cuban Crocodile, Lead section
Its preferred habitat comprises freshwater and brackish water environments, such as mangrove swamps, coastal lagoons, estuaries, marshes, floodplains, and river deltas.
View the Source
Wikipedia: Fishing Cat
WikipediaHome To: Fishing Cat, Lead section
Quote, Home To: Fishing Cat, Lead section
It lives mostly in the vicinity of wetlands, along rivers, streams, oxbow lakes, in swamps and mangroves where it preys mostly on fish.
View the Source
Termite (Wikipedia)
Wikimedia FoundationHome To: Termite, Nests
Quote, Home To: Termite, Nests
Arboreal carton nests of mangrove swamp-dwelling Nasutitermes are enriched in lignin and depleted in cellulose and xylans.
View the Source
Wikipedia: Bald Eagle
WikipediaHome To: Bald Eagle, Habitat
Quote, Home To: Bald Eagle, Habitat
In Florida, nesting habitats often consist of mangrove swamps, the shorelines of lakes and rivers, pinelands, seasonally flooded flatwoods, hardwood swamps, and open prairies and pastureland with scattered tall trees.
View the Source
Ocelot (Wikipedia)
Wikimedia FoundationHome To: Ocelot, Distribution and habitat
Quote, Home To: Ocelot, Distribution and habitat
It inhabits tropical forests, thorn forests, mangrove swamps and savannas.
View the Source
Wikipedia: Box jellyfish
WikipediaHome To: Box Jellyfish, Distribution
Quote, Home To: Box Jellyfish, Distribution
They have been spotted in near-shore habitats such as mangroves, coral reefs, kelp forests, and sandy beaches.
View the Source
Macaca fascicularis (Wikipedia)
Home To: Crab-eating Macaque, Distribution and habitat
Quote, Home To: Crab-eating Macaque, Distribution and habitat
It lives in a wide variety of habitats, including primary lowland rainforests, disturbed and secondary rainforests, shrubland, and riverine and coastal forests of nipa palm and mangrove.
View the Source
Wikipedia: Lined seahorse
Home To: Lined Seahorse, Habitat and distribution
Quote, Home To: Lined Seahorse, Habitat and distribution
The habitat of the lined seahorse consists of marine vegetation, such as suspended Sargassum, seagrass, sponges, and mangroves.
View the Source
Wikipedia: Trichoplax
WikipediaHome To: Trichoplax, Distribution and habitat
Quote, Home To: Trichoplax, Distribution and habitat
Field specimens tend to be found in the coastal tidal zones of tropical and subtropical seas, on such substrates as the trunks and roots of mangroves, shells of molluscs, fragments of stony corals or simply on pieces of rock.
View the Source
Wikipedia: Aldabra Giant Tortoise
WikipediaHome To: Aldabra Giant Tortoise, Range and distribution
Quote, Home To: Aldabra Giant Tortoise, Range and distribution
The tortoises exploit many different kinds of habitat, including grasslands, low scrub, mangrove swamps, and coastal dunes.
View the Source
Wikipedia: Knight anole
Home To: Knight Anole, Distribution and habitat
Quote, Home To: Knight Anole, Distribution and habitat
In Cuba they can be seen from near sea level to an altitude of 3,300 ft (1,000 m) in a wide range of habitats with trees, such as forest, mangrove, savanna, cultivated areas and gardens.
View the Source
Wikipedia: Roseate Spoonbill
WikipediaHome To: Roseate Spoonbill, Breeding
Quote, Home To: Roseate Spoonbill, Breeding
The roseate spoonbill nests in shrubs or trees, often mangroves, laying two to five eggs, which are whitish with brown markings.
View the Source
Wikipedia: Crab-eating raccoon
Home To: Crab-eating Raccoon, Behavior
Quote, Home To: Crab-eating Raccoon, Behavior
In Panama and Costa Rica, where it is sympatric with the common raccoon, it will be strictly found in inland rivers and streams, while the common raccoon lives in mangrove forests and swamps.
View the Source
Mourning collared dove (Wikipedia)
Home To: Mourning Collared Dove, Reproduction
Quote, Home To: Mourning Collared Dove, Reproduction
They tend to build a stick nest in low tree branch or bush, preferably closer to the ground, often a mangrove.
View the Source
Slender Seahorse (Wikipedia)
Home To: Slender Seahorse, Habitat and distribution
Quote, Home To: Slender Seahorse, Habitat and distribution
The slender seahorse has an affinity for coral reefs and seagrass beds and can be found on gorgonian coral, seagrass, mangroves, and Sargassum.
View the Source
Erythrodiplax berenice (Wikipedia)
Home To: Erythrodiplax berenice, Saltwater tolerance
Quote, Home To: Erythrodiplax berenice, Saltwater tolerance
Nymph development has been recorded as frequently occurring in mangrove forests in waters up to 48 ppm salt (open ocean seawater is 35 ppm on average).
View the Source
Wikipedia: Slow loris
Home To: Slow Loris (Nycticebus), Habitat
Quote, Home To: Slow Loris (Nycticebus), Habitat
Slow lorises range across tropical and subtropical regions and are found in primary and secondary rainforests, as well as bamboo groves and mangrove forests.
View the Source
Wikipedia: Phelsuma abbotti
WikipediaHome To: Aldabra Day Gecko, Habitat
Quote, Home To: Aldabra Day Gecko, Habitat
The natural habitats of P. abbotti are subtropical or tropical dry forests, subtropical or tropical moist lowland forests, subtropical or tropical mangrove forests, subtropical or tropical dry shrubland, rural gardens, urban areas, and introduced vegetation.
View the Source
Wikipedia: Mudskipper
WikipediaHome To: Mudskipper, Habitat: Mangrove Forest
Quote, Home To: Mudskipper, Habitat: Mangrove Forest
It can be found in mangrove ecosystems and mudflats of East Africa and Madagascar
View the Source
Trichosurus vulpecula - Animal Diversity Web
Home To: Common Brushtail Possum, Habitat
Quote, Home To: Common Brushtail Possum, Habitat
In the Australian northwest, it prefers eucalyptus forests and mangroves.
View the Source
GBIF (Global Biodiversity Information Facility): GBIF species descriptions for Catopuma badia
GBIF (Global Biodiversity Information Facility)Home To: Bay Cat, Habitat description mangrove
Quote, Home To: Bay Cat, Habitat description mangrove
Bay Cats occur in a variety offorested habitats, including low and hill dipterocarp forests, mangrove, riverine, and montane forests
View the Source

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