Forest Ecosystems
Akopọ
Forests cover less than a third of the land yet hold most of its living things, store huge amounts of carbon and quietly regulate water and climate for everyone. Tropical rainforests alone are home to more than half of all known plant and animal species. When a forest is cleared the loss is rarely just trees: soils wash away, rivers silt up, rainfall patterns shift and species vanish before we have even named them.
In this lesson you will learn how a rainforest is structured into layers, what drives deforestation, and the chain of impacts that follows when the trees go. You will then examine why forests must be managed sustainably, from their role as carbon sinks to flood control and medicine, and study real examples of clearance and of forests being managed for the future.
Awọn Afojusun
- 5.2.1 Describe and explain the causes of deforestation, limited to: (a) logging and timber extraction (b) subsistence and commercial farming (c) roads and settlements (d) rock, ore and mineral extraction (e) hydro-electric power stations (f) climate change.
- 5.2.2 Describe and explain the impacts of deforestation, limited to: (a) habitat loss (b) loss of biodiversity (c) soil erosion and desertification (d) silting and flooding (e) global warming (f) changes to rainfall patterns (g) genetic depletion.
- 5.2.3 Define sustainable management of forests as balancing the needs of the environment, wildlife and humans while conserving forests for future generations.
- 5.2.4 Describe and explain the need for the sustainable management of forests, limited to: (a) climate regulation: trees act as carbon sinks and stores (b) role in water cycle: interception, water uptake, transpiration and surface run-off (c) flood control (d) prevention of soil erosion (e) genetic resource (f) food, medicine and raw materials (g) opportunities for recreation, ecotourism and education.
Ẹ̀kọ́ Ohùn
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Àwòrán ọpọlọ
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Káàdì ìrántí
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Ṣe ìdánrawò káàdì wọ̀nyí nínú áàpù
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Gba ohun èlò Green Bridge CBT sórí fóònù tàbí kọ̀mpútà rẹ fún gbogbo ilé ìkàwé IGCSE: ìwé ìdánwò àtijọ́, ìlànà ìdíwọ̀n, àwòrán èrò, káàdì ìkẹ́kọ̀ọ́ àti ẹ̀kọ́ ohùn.
Ìdánwò Ẹ̀kọ́
Oriire fun ipari ẹkọ lori Forest Ecosystems. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.
Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- The tallest trees that grow above the rest of a rainforest form the: A. canopy B. understorey C. emergent layer D. forest floor Answer: C
- Which of these is a cause of deforestation? A. afforestation B. selective logging only C. building roads and settlements D. transpiration Answer: C
- Forests are described as carbon sinks because they: A. release carbon dioxide B. absorb more carbon dioxide than they release C. store water D. cause flooding Answer: B
- A major reason rainforest soil becomes infertile after clearing is that: A. it contains too much water B. most nutrients were stored in the plants, not the soil C. it is too cold D. there are no rocks Answer: B
- Removing only some mature trees so the forest can regrow is called: A. clear-felling B. selective logging C. desertification D. silting Answer: B
Ṣiṣẹ́ lórí àwọn ìbéèrè wọ̀nyí nínú ohun èlò náà
Ṣiṣẹ́ lórí àwọn ìbéèrè wọ̀nyí nínú ohun èlò náà
Awọn Iwe Itọsọna Ti a Gba Nimọran
Ẹ̀kọ́ síwájú láti àwọn orísun ṣíṣí
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Abala ìwé ẹ̀kọ́
The Role of Seed Plants
Explain how angiosperm diversity is due, in part, to multiple interactions with animals
"Biology: The Role of Seed Plants" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/biology/pages/26-4-the-role-of-seed-plants. Access for free at https://openstax.org/books/biology/pages/1-introduction
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Abala ìwé ẹ̀kọ́
Threats to Biodiversity
Identify significant threats to biodiversity
"Biology: Threats to Biodiversity" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/biology/pages/47-3-threats-to-biodiversity. Access for free at https://openstax.org/books/biology/pages/1-introduction
Àwọn àjọ mìíràn ló tẹ̀ wọ́n jáde lábẹ́ ìwé àṣẹ ṣíṣí, a sì dá wọn lọ́lá bí wọ́n ṣe béèrè. Àwọn ìjápọ̀ ń ṣí ojú òpó wọn.
Ṣe Adaṣe Awọn Ibeere Idanwo Adaṣe
Ṣe o fẹ ṣe adaṣe awọn ibeere idanwo adaṣe nipa Forest Ecosystems? Ṣe igbasilẹ ohun elo Green Bridge CBT lati wọle si awọn ibeere idanwo adaṣe ati awọn ayẹwo adaṣe kikun fun koko-ọrọ yii.
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