CO2 emissions embodied in international trade: A multiregional Inputoutput model for Spain

As a result of globalization and free trade agreements, international trade is enormously growing and inevitably putting more pressure on the environment over the last few decades. This has drawn the attention of both environmentalist and economist in response to the ever growing concerns of climate change and urgent need of international action for its mitigation. In this work we aim at analyzing the implication of international trade in terms of CO2 between Spain and its important partners using a multi-regional input-output (MRIO) model. A fully integrated 13 regions MRIO model is constructed to examine the pollution responsibility of Spain both from production and consumption perspectives. The empirical results show that Spain is a net importer of CO2 emissions which is equivalent to 29% of its emission due to production. Even though the leading partner with regard to import values are countries such as Germany, France, Italy and Great Britain, the CO2 embodied due to trade with China takes the largest share. This is mainly due to the importation of energy intensive products from China coupled with Chinese poor energy mix which is dominated by coal-power plant. The largest portion (67%) of the global imported CO2 emissions is due to intermediate demand requirements by production sectors. Products such as Motor vehicles, chemicals, a variety of machineries and equipments, textile and leather products, construction materials are the key imports that drive the emissions due to their production in the respective exporting countries. Being at its peak in 2005, the Construction sector is the most responsible activity behind both domestic and imported emissions.

Direct and indirect root defences of milkweed (Asclepias syriaca): trophic cascades, trade-offs and novel methods for studying subterranean herbivory

P>1. Entomopathogenic nematodes can function as indirect defence for plants that are attacked by root herbivores. By releasing volatile organic compounds (VOCs), plants signal the presence of host insects and thereby attract nematodes.2. Nonetheless, how roots deploy indirect defences, how indirect defences relate to direct defences, and the ecological consequences of root defence allocation for herbivores and plant biomass are essentially unknown.3. We investigate a natural below-ground tritrophic system, involving common milkweed, a specialist root-boring beetle and entomopathogenic nematodes, and asked whether there is a negative genetic correlation between direct defences (root cardenolides) and indirect defences (emission of volatiles in the roots and nematode attraction), and between constitutive and inducible defences.4. Volatiles of roots were analysed using two distinct sampling methods. First, we collected emissions from living Asclepias syriaca roots by dynamic headspace sampling. This method showed that attacked A. syriaca plants emit five times higher levels of volatiles than control plants. Secondly, we used a solid phase micro-extraction (SPME) method to sample the full pool of volatiles in roots for genetic correlations of volatile biosynthesis.5. Field experiments showed that entomopathogenic nematodes prevent the loss of biomass to root herbivory. Additionally, suppression of root herbivores was mediated directly by cardenolides and indirectly by the attraction of nematodes. Genetic families of plants with high cardenolides benefited less from nematodes compared to low-cardenolide families, suggesting that direct and indirect defences may be redundant. Although constitutive and induced root defences traded off within each strategy (for both direct and indirect defence, cardenolides and VOCs, respectively), we found no trade-off between the two strategies.6. Synthesis. Constitutive expression and inducibility of defences may trade off because of resource limitation or because they are redundant. Direct and indirect defences do not trade off, likely because they may not share a limiting resource and because independently they may promote defence across the patchiness of herbivore attack and nematode presence in the field. Indeed, some redundancy in strategies may be necessary to increase effective defence, but for each strategy, an economy of deployment reduces overall costs.

[Archives de la Parole]. , [Parable of the prodigal son] : récit en dravidien, telugu, Province de Madras / [Sir George Grierson], éd. ; Linguistic survey of India ; Voix parlée, homme

[Traditions. Asie. Inde. Présidence de Madras [i.e. Chennai]. Ceded Districts]

[Archives de la Parole]. , [Parable of the prodigal son] : récit en télougou / [Sir George Grierson], éd. ; Linguistic survey of India ; Voix parlée, homme

[Traditions. Asie. Inde. Province de Madras [i.e. Chennai]]

[Archives de la Parole]. , [Parable of the prodigal son] : récit en télougou [sic] / [Sir George Grierson], éd. ; Linguistic survey of India ; [Ranga], voix

[Traditions. Asie. Inde. Province de Madras [i.e. Chennai]. Etat du Tamil Nadu]

[Archives de la Parole]. , Pombada Songs / [Sir George Grierson], éd. ; Linguistic survey of India ; [Tyampa Pombada et Venku], voix

[Traditions. Asie. Inde. Province de Madras [i.e. Chennai]. Région de Kanara]

[Archives de la Parole]. , [Cowardice of the Bania class] : récit shindi [i.e. sindhi] / [Sir George Grierson], éd. ; Linguistic survey of India ; [Mulshankar Somjimal], voix

[Traditions. Asie. Inde. Présidence de Bombay. Pakistan. Province du Sind. Tharparkar]

[Archives de la Parole]. , [Parable of the prodigal son] : récit en hindoustani [mēwātī] / [Sir George Grierson], éd. ; Linguistic survey of India ; [Jainti Pershad], voix

[Traditions. Asie. Inde. Province de Delhi]

[Archives de la Parole]. , Récit en hindoustani [urdū] / [Sir George Grierson], éd. ; Linguistic survey of India ; [Baqir Ali], voix

[Traditions. Asie. Inde. Province de Delhi]

[Archives de la Parole]. , [Parable of the prodigal son] : Récit en hindoustani / [Sir George Grierson], éd. ; Linguistic survey of India ; [Jainti Pershad], voix

[Traditions. Asie. Inde. Province de Delhi]

[Archives de la Parole]. , [The story of a son-in-law] : Indo-aryen, marathi, groupe Occidental / [Sir George Grierson], éd. ; Linguistic survey of India ; [S.B. Naik], voix

[Traditions. Asie. Inde. État du Maharashtra. Dhule]

[Archives de la Parole]. , [Beauty of the beloved and the longing of the lover] : récit Hindi, Indo-aryen, g. Central / [Sir George Grierson], éd. ; Linguistic survey of India ; [Parmanand Mewaram], voix

[Traditions. Asie. Inde. Pakistan. Province du Sind. Haidarābād]

[Archives de la Parole]. , Récit [Bheeshma's vow] : Khorna, Indo-aryen, groupe de l'Himalaya / [Sir George Grierson], éd. ; Linguistic survey of India ; [A.S. Shanbhag], voix

[Traditions. Asie. Inde. Etat du Karnataka. Kanara]

[Archives de la Parole]. , Hōli Song (complainte) : in maithili / [Sir George Grierson], éd. ; Linguistic survey of India ; [Ramanand Prasad Varma], voix

[Traditions. Asie. Inde. Province du Bihar. Darbhanga]

[Archives de la Parole]. , [Parable of the prodigal son] : récit en tamoul / [Sir George Grierson], éd. ; Linguistic survey of India ; Voix parlée, homme

[Traditions. Asie. Inde. Province de Madras [i.e. Chennai]]