Practise IB Biology HL B4.1 with population and community data questions on interactions, biodiversity, ecological change and sustainability.
The distribution of native grasses in a temperate arid region of Mendoza, Argentina, was studied in six habitats (I to VI) at different altitudes. The table shows the presence (+) or absence (-) of the species in each habitat.
Suggest one abiotic factor, other than altitude, that could be affecting the distribution of species in the different habitats.
Define habitat.
The diagram shows a nephron from a mammal.
Outline two adaptations for water conservation in leaves of desert plants.
The model describes the fundamental and realized niches of a species of microscopic marine arthropod in the Northern hemisphere with respect to two different factors ( X and Y ). The abundance of the species is shown over twelve months. The fundamental niche is separated into five zones ranging from critical to optimal conditions. The population of the species in its realized niche each month is represented by an oval. The size of each oval shows the population abundance.
Outline how factor Y affects the species from January to April.
Suggest, with a reason, what factor Y could be.