Extent of invasion by alien species at the observation site and within a 0.001deg lat/lon range (approximately 1ha). Please choose the highest appropriate level. More details in the comments at https://www.inaturalist.org/observation_fields/12426 .

Datatype: text
Allowed values:
(undefined value) 6
0 - absent (P less than 50% in 5y) 18
1 - likely (Probability >50% in 5y) 16
2 - beginning (max 0.04% = 4m2/ha) 14
3 - significant (max 0.2% = 20m2/ha) 30
4 - massive (max 1% = 100m2/ha) 23
5 - overwhelming (max 5% = 500m2/ha) 20
6 - irreversible (max 25% invaded area) 15
7 - uncontrollable (max 85% invaded area) 2
8 - finalising (max 97% invaded area) 14
9 - complete (>97% invaded area) 9
Created by: mferreira mferreira
Values:

Observations specifying this field

Observation Invasion extent

Photos / Sounds

What

American Pokeweed (Phytolacca americana)

Observer

mferreira

Date

July 20, 2021 08:56 PM WEST

Description

i6 E.glo P.ame
LBFV

6 - irreversible (max 25% invaded area)

Photos / Sounds

What

Bushy Needlewood (Hakea decurrens)

Observer

mferreira

Date

May 30, 2021 01:23 PM CEST

Description

i7 H.dec E.glo A.dea

7 - uncontrollable (max 85% invaded area)

Photos / Sounds

What

Bushy Needlewood (Hakea decurrens)

Observer

mferreira

Date

May 28, 2021 12:14 PM CEST

Description

i6 H.dec E.glo A.dea

6 - irreversible (max 25% invaded area)

Photos / Sounds

What

Bushy Needlewood (Hakea decurrens)

Observer

mferreira

Date

April 24, 2021 12:47 PM CEST

Description

i8 H.ser E.glo

8 - finalising (max 97% invaded area)

Photos / Sounds

What

Tall Flatsedge (Cyperus eragrostis)

Observer

mferreira

Date

March 11, 2021 02:40 PM WET

Description

i1 C.era

1 - likely (Probability >50% in 5y)

Photos / Sounds

What

Silver Wattle (Acacia dealbata)

Observer

mferreira

Date

July 20, 2021 06:19 PM WEST

Description

i5 A.dea E.glo A.mel
LBFV

5 - overwhelming (max 5% = 500m2/ha)

Photos / Sounds

What

Sweet Chestnut (Castanea sativa)

Observer

mferreira

Date

July 11, 2021 10:39 AM CEST

Description

i8 (invasion: 8 - finalising) Até 97% de área invadida num espaço de 1ha em redor (raio 60m aproximadamente)

8 - finalising (max 97% invaded area)

Photos / Sounds

What

Maritime Pine (Pinus pinaster)

Observer

mferreira

Date

July 11, 2021 12:33 PM CEST

Description

i1 (invasion: 1 - likely) A.dea Risco de invasão nos próximos 5 anos superior ou igual a 50%

1 - likely (Probability >50% in 5y)

Photos / Sounds

What

Maritime Pine (Pinus pinaster)

Observer

mferreira

Date

July 11, 2021 01:00 PM CEST

Description

i0 (invasion: 0 - absent) Risco de invasão nos próximos 5 anos inferior a 50%

0 - absent (P less than 50% in 5y)

Photos / Sounds

What

Blackwood (Acacia melanoxylon)

Observer

mferreira

Date

July 11, 2021 09:51 AM CEST

Description

i9 A.mel (invasion: 9 - complete) Mais de 97% de área invadida num espaço de 1ha em redor (raio 60m aproximadamente)

9 - complete (>97% invaded area)

Photos / Sounds

What

Blackwood (Acacia melanoxylon)

Observer

mferreira

Date

July 11, 2021 09:39 AM CEST

Description

i5 A.dea A.mel (invasion: 5 - overwhelming) Área invadida até 500 m2/ha (5%)

5 - overwhelming (max 5% = 500m2/ha)

Photos / Sounds

What

Scots Pine (Pinus sylvestris)

Observer

mferreira

Date

July 11, 2021 01:08 PM CEST

Description

i0
LBFV

0 - absent (P less than 50% in 5y)

Photos / Sounds

What

Common Bracken (Pteridium aquilinum)

Observer

mferreira

Date

July 11, 2021 12:34 PM CEST

Description

i0
LBFV

0 - absent (P less than 50% in 5y)

Photos / Sounds

What

Silver Wattle (Acacia dealbata)

Observer

mferreira

Date

July 11, 2021 12:14 PM CEST

Description

i5 A.dea A.mel
LBFV

5 - overwhelming (max 5% = 500m2/ha)

Photos / Sounds

What

Eurabbie (Eucalyptus globulus)

Observer

mferreira

Date

July 8, 2021 03:29 PM CEST

Description

i5 E.glo A.mel Área invadida até 500 m2/ha (5%)
LBFV

5 - overwhelming (max 5% = 500m2/ha)

Photos / Sounds

What

Strawberry Tree (Arbutus unedo)

Observer

mferreira

Date

July 8, 2021 03:23 PM CEST

Description

i6 A.mel A.dea Até 25% de área invadida num espaço de 1ha em redor (raio 60m aproximadamente)
LBFV

6 - irreversible (max 25% invaded area)

Photos / Sounds

What

Narrow-leaved Ash (Fraxinus angustifolia)

Observer

mferreira

Date

June 26, 2021 01:51 PM CEST

Description

i8 A.mel
LBFV

8 - finalising (max 97% invaded area)

Photos / Sounds

What

Blackwood (Acacia melanoxylon)

Observer

mferreira

Date

June 26, 2021 01:50 PM CEST

Description

i8 A.mel
LBFV

8 - finalising (max 97% invaded area)

Photos / Sounds

What

Blackwood (Acacia melanoxylon)

Observer

mferreira

Date

June 26, 2021 01:48 PM CEST

Description

i8 A.mel A.dea
LBFV

8 - finalising (max 97% invaded area)

Photos / Sounds

What

Blackwood (Acacia melanoxylon)

Observer

mferreira

Date

June 26, 2021 01:29 PM CEST

Description

i7 A.mel A.dea
LBFV

7 - uncontrollable (max 85% invaded area)

Photos / Sounds

What

Blackwood (Acacia melanoxylon)

Observer

mferreira

Date

June 26, 2021 11:57 AM CEST

Description

i4 A.mel
LBFV

4 - massive (max 1% = 100m2/ha)

Photos / Sounds

What

Strawberry Tree (Arbutus unedo)

Observer

mferreira

Date

June 26, 2021 11:53 AM CEST

Description

i6
LBFV
Cevadouro

6 - irreversible (max 25% invaded area)

Photos / Sounds

What

Silver Wattle (Acacia dealbata)

Observer

mferreira

Date

June 26, 2021 02:52 PM CEST

Description

i8 A.dea Até 97% de área invadida num espaço de 1ha em redor (raio 60m aproximadamente)
LBFV

8 - finalising (max 97% invaded area)

Photos / Sounds

What

Silver Wattle (Acacia dealbata)

Observer

mferreira

Date

June 20, 2021 09:47 AM CEST

Description

i2 A.dea

2 - beginning (max 0.04% = 4m2/ha)

Photos / Sounds

What

Silver Wattle (Acacia dealbata)

Observer

mferreira

Date

June 3, 2021 07:08 PM CEST

Description

i2 A.dea

2 - beginning (max 0.04% = 4m2/ha)

Photos / Sounds

What

Eurabbie (Eucalyptus globulus)

Observer

mferreira

Date

May 26, 2021 11:21 AM CEST

Description

i7 A.dea E.glo A.mel

7 - uncontrollable (max 75% invaded area)

Photos / Sounds

What

Silver Wattle (Acacia dealbata)

Observer

mferreira

Date

May 26, 2021 11:21 AM CEST

Description

i7 A.dea E.glo A.mel

7 - uncontrollable (max 75% invaded area)

Photos / Sounds

Observer

mferreira

Date

May 25, 2021 03:52 PM CEST

Description

i8 A.dea E.glo H.sal

8 - finalising (max 97% invaded area)

Photos / Sounds

What

Silver Wattle (Acacia dealbata)

Observer

mferreira

Date

May 25, 2021 03:43 PM CEST

Description

i3 A.dea

3 - significant (max 0.2% = 20m2/ha)

Photos / Sounds

What

Willow-leaved Hakea (Hakea salicifolia)

Observer

mferreira

Date

May 25, 2021 03:39 PM CEST

Description

i3 H.sal A.dea

3 - significant (max 0.2% = 20m2/ha)
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Comments

0 - no invasion: known invasive alien species were not seen at the site or in its vicinity. Invasion is unlikely to occur in the following decade or more, even without preemptive intervention.
(Abbreviated tag: "invasion: 0 - absent")

Posted by mferreira about 1 year ago (Flag)

1 - at risk: no invasive alien species were observed at the site but they might be present (seeds, roots, sprouts, etc.) because they were seen nearby. Without preemptive measures, invasion is very likely to occur within one decade.
(Abbreviated tag: "invasion: 1 - likely")

Posted by mferreira about 1 year ago (Flag)

2 - first stages: some specimens of invasive alien species were seen at the site but it may be easy to remove them (single intervention by a couple of people, for less than a couple of hours, using bare hands or just manual tools, eventually with a couple of visits in the following months or years).
(Abbreviated tag: "invasion: 2 - beginning")

Posted by mferreira about 1 year ago (Flag)

3 - significant invasion: it may be possible to revert the invasion but several interventions will be needed, involving several people (half a dozen or more). No machinery should be needed.
(Abbreviated tag: "invasion: 3 - significant")

Posted by mferreira about 1 year ago (Flag)

4 - massive invasion: it may be possible to revert the invasion but that would require an intensive intervention by specialized people with appropriate machinery.
(Abbreviated tag: "invasion: 4 - massive")

Posted by mferreira about 1 year ago (Flag)

5 - nearly irreversible: the removal of invasive alien species and ecosystem restoration would require intensive and long-term intervention, not only at the site but also in the vicinity, for many years or several decades. Though theoretically possible, it would require excessive resources, unlikely to be available for such an extended period.
(Abbreviated tag: "invasion: 5 - overwhelming")

Posted by mferreira about 1 year ago (Flag)

6 - irreversible invasion: some native species are still present at the site but they are unable to compete with the invasive alien species and are likely to disappear within a decade. Moreover, the density of invasive alien species is so high (with seeds and/or roots all over the place) that even a massive intervention with appropriate machinery would be insufficient to revert the invasion. Through repeated intervention, it may be possible to control the density of invasive alien species in order to prevent the total disappearance of native species, but not more than that.
(Abbreviated tag: "invasion: 6 - irreversible")

Posted by mferreira about 1 year ago (Flag)

7 - uncontrollable invasion: the density of invasive alien species is so high (including seeds in the soil, sprouts from the roots, etc.) that it is no longer feasible to prevent the growth of more invasive plants at the site. The remaining patches of native vegetation will inexorably be replaced by the invasive alien species within a few years.
(Abbreviated tag: "invasion: 7 - uncontrollable")

Posted by mferreira about 1 year ago (Flag)

8 - final stages: there are just a few small patches of native vegetation at the site (few meters in diameter) which will soon disappear as the invasive alien species grow and expand (reducing sunlight, available nutrients, etc.).
(Abbreviated tag: "invasion: 8 - finalising")

Posted by mferreira about 1 year ago (Flag)

9 - full invasion: the invasive alien species have occupied the whole site, changing the environment in their favour (soil composition, shading, etc.) and displacing almost all native species. The only remaining native species are the ones that can coexist with the invasive alien species or perhaps benefit from them (for example fungi that are able to feed from the organic matter in the soil).
(Abbreviated tag: "invasion: 9 - complete")

Posted by mferreira about 1 year ago (Flag)

Versão portuguesa (com alguns melhoramentos e esclarecimentos):
Em https://www.inaturalist.org/journal/mferreira/40453-uma-escala-para-avaliar-a-presenca-de-especies-exoticas-invasoras-em-cada-local poderá encontrar uma descrição de cada nível de invasão em Português. Os níveis foram agrupados dois a dois para mais fácil compreensão. São referidas algumas vantagens das "etiquetas" relativamente aos "campos" e é sugerida uma etiqueta para cada nível de invasão.

Posted by mferreira about 1 year ago (Flag)

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