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Adaptations that Reduce Water Loss

Adaptations that Reduce Water Loss

Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.

Introduction to Seed Plants

Introduction to Seed Plants

Most plants are seed plants—characterized by seeds, pollen, and reduced gametophytes. Seed plants include gymnosperms and angiosperms.

Epiphytes, Parasites, and Carnivores

Epiphytes, Parasites, and Carnivores

Plants often form mutualistic relationships with soil-dwelling fungi or bacteria to enhance their roots’ nutrient uptake ability. Root-colonizing fungi (e.g., mycorrhizae) increase a plant’s root surface area, which promotes nutrient absorption. While root-colonizing, nitrogen-fixing bacteria (e.g., rhizobia) convert atmospheric nitrogen (N2) into ammonia (NH3), making nitrogen available to plants for various biological functions. For example, nitrogen is essential for the biosynthesis of the...

Responses to Drought and Flooding

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Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.

Light Acquisition

Light Acquisition

In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.

Non-vascular Seedless Plants

Non-vascular Seedless Plants

The diverse plant life on Earth—consisting of nearly 400,000 species—can be divided into three broad categories based on biological characteristics: nonvascular, seedless vascular, and seed plants.

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Related Experiment Video

Updated: May 17, 2026

Reconstructing Terrestrial Paleoclimate and Paleoecology with Fossil Leaves Using Digital Leaf Physiognomy and Leaf Mass Per Area

Reconstructing Terrestrial Paleoclimate and Paleoecology with Fossil Leaves Using Digital Leaf Physiognomy and Leaf Mass Per Area

Published on: October 25, 2024

Giant eucalypts - globally unique fire-adapted rain-forest trees?

D Y P Tng¹, G J Williamson¹, G J Jordan¹

¹School of Plant Science, University of Tasmania, Private Bag 55, Hobart, Tasmania, 7001, Australia.

The New Phytologist

|November 6, 2012

Summary

Giant eucalyptus trees in Australia, rare globally, thrive in rainforest climates. Their gigantism is linked to fire, competition, and a unique

Keywords:

eucalypt forest fire ecology flammability giant trees old-growth forest plant height rain-forest succession

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Cortisol Measurement in Koala (Phascolarctos cinereus) Fur

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Published on: August 23, 2019

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Last Updated: May 17, 2026

Reconstructing Terrestrial Paleoclimate and Paleoecology with Fossil Leaves Using Digital Leaf Physiognomy and Leaf Mass Per Area

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Published on: October 25, 2024

Cortisol Measurement in Koala (Phascolarctos cinereus) Fur

Cortisol Measurement in Koala (Phascolarctos cinereus) Fur

Published on: August 23, 2019

Area of Science:

Ecology
Botany
Forest Science

Background:

Giant tree species exceeding 70m are globally rare.
Tallest angiosperms, Eucalyptus spp. (eucalypts), are found in Australia.
Giant eucalypts create unique ecosystems with rainforest trees or shrubby understoreys.

Purpose of the Study:

To investigate the ecological factors contributing to the gigantism of Eucalyptus species.
To understand the role of fire and competition in the abundance of giant eucalypts.
To re-evaluate the classification of giant eucalypts within their ecosystems.

Main Methods:

Comparative analysis of giant gymnosperms and angiosperms globally.
Ecological assessment of Eucalyptus spp. distribution and co-occurring vegetation.
Examination of fire ecology and regeneration patterns in giant eucalypt habitats.

Main Results:

Giant eucalypts are concentrated in Australia, co-occurring with rainforest flora or shrublands.
Fire activity and landscape setting influence the local abundance of giant eucalypts.
Eucalypt gigantism may be driven by intense competition and a capacity for 'hyper-emergence'.

Conclusions:

Giant eucalypts, despite fire dependence for regeneration, are long-lived rainforest pioneers.
These unique ecosystems possess high conservation value.
Further research is needed on their specific adaptations and ecological roles.