Abstract
Current knowledge, although significant, does not yet provide a full understanding of the functioning of swamp forests in Central Africa. The aim of this study was to estimate the species importance value index (IVI) and characterise the stand structure of three forest types in the Likouala swamp forest in the north of the Republic of Congo. The forest inventory was carried out in flooded forest (FF), periodically flooded forest (PFF) and terra firme forest (TFF), focusing only on trees with a diameter of 10 cm or more. In each forest type, species of very high ecological importance value made up more than 56% of the species recorded, and their numbers increased as we moved from TFF to FF, with a marked predominance of sciaphyte species. This dominance was corroborated by the inverted J-shaped distribution curves observed in the three types of forest, indicating good natural regeneration. Furthermore, the mean values for stem density per hectare decrease from FF (445±8 stems/ha) to TFF (351±13 stems/ha), while those for basal area and height tend to increase in the same order, from 30.00±2.1 m2/ha to 35.46±3.2 m2/ha and from 20.26±4.20 m to 26.10±5.82 m respectively. In short, the low representation of pioneer species suggests a gradual evolution of each type of Likouala swamp forest towards a mature stage, characterised by a physiognomy dominated by sciaphyte species.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
In each of the three forest types, species of very high ecological importance value made up more than 56% of the species recorded.
Verbatim
t0“Ecological importance of trees”
e0“species of very high ecological importance value made up more than 56% of the species recorded”
Claim · model-written summary
The numbers of species of very high ecological importance value increased from terra firme to flooded forest.
Verbatim
t0“Ecological importance of trees”
e0“their numbers increased as we moved from TFF to FF”
Claim · model-written summary
Sciaphyte species markedly predominated among the trees.
Verbatim
t0“Ecological importance of trees”
e0“a marked predominance of sciaphyte species”
Claim · model-written summary
Inverted J-shaped distribution curves in the three forest types indicate good natural regeneration.
Verbatim
t0“Ecological importance of trees”
e0“inverted J-shaped distribution curves observed in the three types of forest, indicating good natural regeneration”
Claim · model-written summary
Mean stem density per hectare decreased from flooded forest (445±8 stems/ha) to terra firme forest (351±13 stems/ha).
Verbatim
t0“Ecological importance of trees”
e0“the mean values for stem density per hectare decrease from FF (445±8 stems/ha) to TFF (351±13 stems/ha)”
Claim · model-written summary
Basal area tended to increase from flooded to terra firme forest, from 30.00±2.1 to 35.46±3.2 m2/ha.
Verbatim
t0“Ecological importance of trees”
e0“while those for basal area and height tend to increase in the same order, from 30.00±2.1 m2/ha to 35.46±3.2 m2/ha and from 20.26±4.20 m to 26.10±5.82 m respectively”
Claim · model-written summary
Tree height tended to increase from flooded to terra firme forest, from 20.26±4.20 m to 26.10±5.82 m.
Verbatim
t0“Ecological importance of trees”
e0“while those for basal area and height tend to increase in the same order, from 30.00±2.1 m2/ha to 35.46±3.2 m2/ha and from 20.26±4.20 m to 26.10±5.82 m respectively”
Claim · model-written summary
The low representation of pioneer species suggests a gradual evolution of each forest type toward a mature stage.
Verbatim
t0“Ecological importance of trees”
e0“the low representation of pioneer species suggests a gradual evolution of each type of Likouala swamp forest towards a mature stage”