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Overview

Distribution

Range Description

In Australia Agathis robusta ssp. robusta has two disjunct areas of distribution: in the Cook and Kennedy districts of northern Queensland, and at Wide Bay, southeastern Queensland

In Papua New Guinea the typical subspecies has been recorded from a small area near Port Moresby. The second subspecies (A. robusta ssp. nesophila Whitmore) occurs in various localities in the Owen Stanley Range as well as in New Britain. These subpopulations are sometimes referred to as Agathis spathulata de Laub.

The overall extent of occurrence for A. robusta exceeds 20,000 km2. The total area of occupancy is estimated to be less than 500 km2. There are 8-10 locations.
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Source: IUCN

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Localities documented in Tropicos sources

Dammara robusta C. Moore ex F. Muell.:
Australia (Oceania)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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© Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO 63110 USA

Source: Missouri Botanical Garden

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Localities documented in Tropicos sources

Agathis robusta (C. Moore ex F. Muell.) F.M. Bailey:
El Salvador (Mesoamerica)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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Physical Description

Morphology

Physical Description

Tree, Evergreen, Monoecious, Habit erect, Trees without or rarely having knees, Primary plant stem smooth, Tree with bark smooth, Tree with bark shaggy or peeling, Young shoots 3-dimensional, Buds not resinous, Leaves broad, Leaves opposite, Non-needle-like leaf margins dentate or serrate, Leaf apex acute, Leaves > 5 cm long, Leaves > 10 cm long, Leaves not blue-green, Scale leaves without raised glands, Twigs glabrous, Twigs not viscid, Twigs without peg-like projections or large fascicles after needles fall, Berry-like cones orange, Bracts of seed cone included, Seeds green, Seeds tan, Seeds brown, Seeds wingless.
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Stephen C. Meyers

Source: USDA NRCS PLANTS Database

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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
Agathis robusta is an emergent tree in lowland subtropical and tropical evergreen or semi-evergreen montane rainforest. It has a wide elevational range occurring from 5 up to 1,900 m a.s.l.

Systems
  • Terrestrial
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Agathis robusta

The following is a representative barcode sequence, the centroid of all available sequences for this species.


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© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

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Statistics of barcoding coverage: Agathis robusta

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 6
Specimens with Barcodes: 6
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2013

Assessor/s
Farjon, A.

Reviewer/s
Thomas, P.

Contributor/s

Justification
Agathis robusta has an estimated extent of occurrence (EOO) considerably more than 20,000 km². Although the estimated area of occupancy (AOO) is less than 500 km², there is no evidence of “net decline” (i.e. a decline somewhere that is greater than an increase elsewhere). This species does not meet the criteria for a threatened category and is listed as Least Concern (LC). The subspecies in Papua New Guinea has been assessed as Vulnerable.
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Population

Population
While no exact data are available to quantify this, it is likely that re-growth in Queensland will offset limited logging in Papua New Guinea. This pertains to the subspecies that occurs in both countries, A. robusta ssp. robusta. The other subspecies, nesophila, is found in remote areas and is at present not known to be targeted although it is likely that lowland stands will have been impacted by logging since the 1970s, especially in New Britain.

Population Trend
Stable
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Threats

Major Threats
It is not known how much effect historical logging has had on the size of the two subpopulations in Queensland, if any. Presently, logging has all but ceased. The subpopulations in Papua New Guinea are still being exploited, in particular the subpopulation of ssp. robusta near Port Moresby.
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Management

Conservation Actions

Conservation Actions
Protected areas and protective policies are effective in Queensland, pertaining to one of the two subspecies only.
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Wikipedia

Agathis robusta

Agathis robusta (syn. A. palmerstonii; Queensland Kauri or Smooth-barked Kauri) is a coniferous tree in the family Araucariaceae, native to eastern Queensland, Australia.

Habitat and Distribution[edit]

It occurs in two localities, a southern population on Fraser Island and around Maryborough, and a northern population on the Atherton Tableland west of Cairns; the northern population was formerly distinguished as Agathis palmerstonii, but does not differ from the southern population and is no longer considered distinct (Whitmore 1980). Trees in Papua New Guinea previously referred to Agathis robusta are now treated as a distinct species Agathis spathulata (de Laubenfels 1988).

Agathis robusta detail of bark

It is a large evergreen tree growing straight and tall to a height of 30–50 m, with smooth, scaly bark. The leaves are 5–12 cm long and 2–5 cm broad, tough and leathery in texture, with no midrib; they are arranged in opposite pairs (rarely whorls of three) on the stem. The seed cones are globose, 8–13 cm diameter, and mature in 18–20 months after pollination; they disintegrate at maturity to release the seeds. The male (pollen) cones are cylindrical, 5–10 cm long and 1-1.5 cm thick.

Uses[edit]

The Queensland Kauri was heavily logged in the past, and spectacular trees of prodigious size are much rarer than in pre-European times; despite this, the species as a whole is not endangered.

Timber logs being hauled by bullock teams in the Eudlo district, Queensland, ca. 1905

References[edit]

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