Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Global Climate Change

Global Climate Change

Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.

What is Climate?

What is Climate?

Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.

Biological Clocks and Seasonal Responses

Biological Clocks and Seasonal Responses

The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.

Thermal Sigmatropic Reactions: Overview

Thermal Sigmatropic Reactions: Overview

Sigmatropic rearrangements are a class of pericyclic reactions in which a σ bond migrates from one part of a π system to another. These are intramolecular rearrangements where the total number of σ and π bonds remain unchanged.
Sigmatropic shifts are classified based on an order term [i,&VeryThinSpace;j&VeryThinSpace;], where i and j indicate the number of atoms across which each end of the σ bond migrates. Below are examples of a [3,3] sigmatropic shift in...

Gyroscope: Precession

Gyroscope: Precession

Precession can be demonstrated effectively through a spinning top. If a spinning top is placed on a flat surface near the surface of the Earth at a vertical angle and is not spinning, it will fall over due to the force of gravity producing a torque acting on its center of mass. However, if the top is spinning on its axis, it precesses about the vertical direction, rather than topple over due to this torque. Precessional motion is a combination of a steady circular motion of the axis and the...

Phase Changes

Phase Changes

Phase transitions play an important theoretical and practical role in the study of heat flow. In melting or fusion, a solid turns into a liquid; the opposite process is freezing. In evaporation, a liquid turns into a gas; the opposite process is condensation.
A substance melts or freezes at a temperature called its melting point and boils or condenses at its boiling point. These temperatures depend on pressure. High pressure favors the denser form of the substance, so typically, high pressure...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Game meat consumption is associated with increased blood lead levels in children in northern Argentina.

Ecotoxicology and environmental safety·2026

Same author

A public database to monitor the spread and impacts of high pathogenicity avian influenza viruses on albatrosses and petrels.

Biodiversity data journal·2026

Same author

Who's Coming Home? Shorter Early-Life Telomeres Predict Return to the Natal Colony in an Arctic Seabird.

Ecological and evolutionary physiology·2026

Same author

Environmental Variability Shapes Life-History Trade-Offs Within and Between Populations of a Long-Lived Seabird.

Ecology letters·2026

Same author

Drivers of age at first reproduction in the wandering albatross (Diomedea exulans): Demographic factors, environmental conditions and sex-specific responses.

The Journal of animal ecology·2026

Same author

Correction: Physiological and behavioural responses of wandering albatross chicks (Diomedea exulans) to novel and non-novel predators.

Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology·2026

Same journal

Epidemiological characteristics of amebiasis in Japan from 2001 to 2022.

PloS one·2026

Same journal

Longitudinal associations of academic stress with eating related patterns, nutrition, somatic indicators, and depressive symptoms in university students: A study protocol.

PloS one·2026

Same journal

Pollution removal efficiency enhancement by agricultural biomass additions in constructed wetlands: A framework integrating meta-analysis with explainable machine learning.

PloS one·2026

Same journal

Insulation failure mapping on power transformer bushing using FRA and electrostatic simulation.

PloS one·2026

Same journal

Enhancing medical Q&A systems with multimodal knowledge graphs and dual-layer attention mechanisms.

PloS one·2026

Same journal

UAMP: Consistent video object segmentation with uncertainty-aware memory propagation.

PloS one·2026

See all related articles

Search research articles

Related Experiment Video

Updated: May 7, 2026

A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data

A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data

Published on: December 9, 2015

Phenological changes in the southern hemisphere.

Lynda E Chambers¹, Res Altwegg, Christophe Barbraud

¹Centre for Australian Weather and Climate Research, Melbourne, Victoria, Australia.

|October 8, 2013

Summary

This summary is machine-generated.

This meta-analysis reveals that southern hemisphere species are experiencing earlier spring events due to climate change, with temperature as a key driver. However, significant data gaps exist in many regions and taxa.

More Related Videos

Investigating the Relationship between Sea Surface Chlorophyll and Major Features of the South China Sea with Satellite Information

Investigating the Relationship between Sea Surface Chlorophyll and Major Features of the South China Sea with Satellite Information

Published on: June 13, 2020

Using Generative Art to Convey Past and Future Climate Transitions

Using Generative Art to Convey Past and Future Climate Transitions

Published on: March 31, 2023

Related Experiment Videos

Last Updated: May 7, 2026

A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data

A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data

Published on: December 9, 2015

Investigating the Relationship between Sea Surface Chlorophyll and Major Features of the South China Sea with Satellite Information

Investigating the Relationship between Sea Surface Chlorophyll and Major Features of the South China Sea with Satellite Information

Published on: June 13, 2020

Using Generative Art to Convey Past and Future Climate Transitions

Using Generative Art to Convey Past and Future Climate Transitions

Published on: March 31, 2023

Area of Science:

Ecology
Climate Change Biology
Phenology

Background:

Current research on phenological responses to climate change is heavily biased towards the Northern Hemisphere.
Phenological shifts are not uniform globally, and Northern Hemisphere temperate data may not apply elsewhere.
Understanding Southern Hemisphere phenology is crucial for accurate global climate change impact assessments.

Purpose of the Study:

To conduct the largest meta-analysis of phenological drivers and trends in the Southern Hemisphere.
To assess phenological shifts in plants and birds across Australasia, South America, and Antarctic regions.
To identify key climatic drivers and regional/taxonomic variations in phenological responses.

Main Methods:

Meta-analysis of 1208 long-term datasets from 89 studies covering 347 species.
Focus on data from Australasia, South America, and Antarctic/subantarctic regions.
Analysis of phenological trends and identification of climatic drivers (temperature and precipitation).

Main Results:

A significant advance in spring phenology was observed, particularly in Australian datasets.
82% of terrestrial and 42% of marine datasets showed statistically significant phenological advances.
Temperature was the most commonly identified driver, though precipitation also played a role, with less predictable effects.

Conclusions:

Phenological shifts in the Southern Hemisphere are occurring, but with regional and taxonomic variability.
Temperature is a primary driver, but the role of precipitation requires further investigation.
Significant data gaps in tropical regions and Africa, along with taxonomic biases, hinder comprehensive global predictions and necessitate targeted data collection efforts.